/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-tiling/mbpr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:52:21,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:52:21,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:52:22,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:52:22,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:52:22,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:52:22,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:52:22,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:52:22,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:52:22,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:52:22,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:52:22,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:52:22,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:52:22,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:52:22,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:52:22,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:52:22,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:52:22,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:52:22,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:52:22,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:52:22,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:52:22,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:52:22,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:52:22,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:52:22,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:52:22,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:52:22,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:52:22,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:52:22,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:52:22,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:52:22,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:52:22,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:52:22,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:52:22,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:52:22,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:52:22,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:52:22,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:52:22,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:52:22,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:52:22,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:52:22,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:52:22,083 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 [2020-10-26 19:52:22,141 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:52:22,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:52:22,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:52:22,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:52:22,144 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:52:22,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:52:22,145 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:52:22,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:52:22,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:52:22,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:52:22,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:52:22,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:52:22,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:52:22,148 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:52:22,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:52:22,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:52:22,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:52:22,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:52:22,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:52:22,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:52:22,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:52:22,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:52:22,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:52:22,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:52:22,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:52:22,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:52:22,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:52:22,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:52:22,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:52:22,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:52:22,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:52:22,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:52:22,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:52:22,586 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:52:22,587 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:52:22,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr4.c [2020-10-26 19:52:22,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1d7e060b/8825404c5c2b455d91fe356109565b9b/FLAG9270de2ba [2020-10-26 19:52:23,411 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:52:23,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/mbpr4.c [2020-10-26 19:52:23,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1d7e060b/8825404c5c2b455d91fe356109565b9b/FLAG9270de2ba [2020-10-26 19:52:23,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1d7e060b/8825404c5c2b455d91fe356109565b9b [2020-10-26 19:52:23,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:52:23,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:52:23,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:52:23,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:52:23,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:52:23,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:52:23" (1/1) ... [2020-10-26 19:52:23,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb0b7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:23, skipping insertion in model container [2020-10-26 19:52:23,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:52:23" (1/1) ... [2020-10-26 19:52:23,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:52:23,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:52:24,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:52:24,081 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:52:24,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:52:24,155 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:52:24,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24 WrapperNode [2020-10-26 19:52:24,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:52:24,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:52:24,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:52:24,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:52:24,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:52:24,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:52:24,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:52:24,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:52:24,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (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 [2020-10-26 19:52:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:52:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:52:24,298 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:52:24,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:52:24,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:52:24,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:52:24,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:52:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:52:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:52:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:52:24,302 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:52:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:52:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:52:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:52:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:52:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:52:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:52:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:52:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:52:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:52:24,940 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:52:24,941 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:52:24,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:52:24 BoogieIcfgContainer [2020-10-26 19:52:24,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:52:24,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:52:24,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:52:24,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:52:24,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:52:23" (1/3) ... [2020-10-26 19:52:24,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a691d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:52:24, skipping insertion in model container [2020-10-26 19:52:24,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (2/3) ... [2020-10-26 19:52:24,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a691d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:52:24, skipping insertion in model container [2020-10-26 19:52:24,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:52:24" (3/3) ... [2020-10-26 19:52:24,956 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2020-10-26 19:52:24,970 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:52:24,976 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:52:24,991 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:52:25,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:52:25,022 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:52:25,022 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:52:25,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:52:25,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:52:25,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:52:25,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:52:25,023 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:52:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-26 19:52:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:52:25,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:25,051 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, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:25,051 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:25,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:25,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1384398134, now seen corresponding path program 1 times [2020-10-26 19:52:25,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:25,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212164733] [2020-10-26 19:52:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:26,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:52:26,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:52:26,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 936 [2020-10-26 19:52:26,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-26 19:52:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:26,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:52:26,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:26,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:26,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:26,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:26,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:52:26,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:26,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:26,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:26,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:26,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:26,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:26,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:26,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:26,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:52:26,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:26,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:26,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:52:26,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:26,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:26,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212164733] [2020-10-26 19:52:26,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:26,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:52:26,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39084039] [2020-10-26 19:52:26,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:52:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:52:26,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:52:26,366 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 3 states. [2020-10-26 19:52:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:26,556 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2020-10-26 19:52:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:52:26,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-26 19:52:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:26,566 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:52:26,567 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:52:26,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:52:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:52:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-26 19:52:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:52:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-26 19:52:26,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 29 [2020-10-26 19:52:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:26,616 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-26 19:52:26,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:52:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-26 19:52:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:52:26,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:26,618 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, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:26,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:52:26,619 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2064771688, now seen corresponding path program 1 times [2020-10-26 19:52:26,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:26,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283539003] [2020-10-26 19:52:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:26,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:31,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:52:31,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:52:31,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:52:31,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:52:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:52:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:31,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:31,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:31,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:31,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:31,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:52:31,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:31,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:31,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:31,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:31,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:31,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:52:31,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:31,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:52:31,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:31,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:52:31,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:31,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283539003] [2020-10-26 19:52:31,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:31,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:52:31,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056393284] [2020-10-26 19:52:31,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:52:31,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:31,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:52:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:52:31,992 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 8 states. [2020-10-26 19:52:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:32,585 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2020-10-26 19:52:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:52:32,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-26 19:52:32,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:32,591 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:52:32,591 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:52:32,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:52:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:52:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-10-26 19:52:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:52:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-26 19:52:32,628 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 29 [2020-10-26 19:52:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:32,629 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-26 19:52:32,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:52:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-26 19:52:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:52:32,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:32,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:32,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:52:32,634 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1938650752, now seen corresponding path program 1 times [2020-10-26 19:52:32,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:32,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285271733] [2020-10-26 19:52:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:32,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:32,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:52:32,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:32,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-26 19:52:32,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:52:32,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:33,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:33,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:33,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:33,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:33,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:33,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:33,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:33,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:33,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:33,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:33,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:52:33,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:33,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:52:33,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285271733] [2020-10-26 19:52:33,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:33,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:52:33,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049573248] [2020-10-26 19:52:33,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:52:33,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:52:33,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:33,085 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 4 states. [2020-10-26 19:52:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:33,255 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-10-26 19:52:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:52:33,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-26 19:52:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:33,257 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:52:33,257 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:52:33,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:52:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-26 19:52:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:52:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-26 19:52:33,268 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 45 [2020-10-26 19:52:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:33,268 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-26 19:52:33,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:52:33,269 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-26 19:52:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:52:33,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:33,270 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:33,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:52:33,271 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1961283006, now seen corresponding path program 1 times [2020-10-26 19:52:33,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:33,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604550904] [2020-10-26 19:52:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:33,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:34,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:34,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:34,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:35,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:38,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:52:38,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:52:38,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-26 19:52:38,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:52:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:52:38,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:39,250 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2020-10-26 19:52:39,460 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 22 [2020-10-26 19:52:39,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:39,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:39,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:39,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:39,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:39,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:39,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:39,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:39,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:39,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:39,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:52:39,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:39,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:52:39,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:39,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:52:39,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:52:39,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604550904] [2020-10-26 19:52:39,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:39,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:52:39,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130223173] [2020-10-26 19:52:39,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:52:39,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:52:39,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:52:39,915 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 17 states. [2020-10-26 19:52:41,660 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-26 19:52:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:43,012 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2020-10-26 19:52:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:52:43,013 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-26 19:52:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:43,017 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:52:43,017 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:52:43,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:52:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:52:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 82. [2020-10-26 19:52:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:52:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2020-10-26 19:52:43,041 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 45 [2020-10-26 19:52:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:43,041 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2020-10-26 19:52:43,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:52:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2020-10-26 19:52:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:52:43,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:43,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:43,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:52:43,044 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash 739534863, now seen corresponding path program 1 times [2020-10-26 19:52:43,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:43,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769022823] [2020-10-26 19:52:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:43,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:43,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:43,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:43,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:43,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:43,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:46,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:48,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:48,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:52:48,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:52:48,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:52:48,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:52:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:52:48,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:48,774 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-26 19:52:49,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:49,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:49,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:49,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:52:49,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:49,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:49,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-10-26 19:52:49,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:49,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:49,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:49,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:52:49,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:52:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:52:49,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:49,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:52:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:49,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:49,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:49,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:49,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:52:49,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:49,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:49,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:52:49,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769022823] [2020-10-26 19:52:49,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:49,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:52:49,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896967754] [2020-10-26 19:52:49,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:52:49,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:49,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:52:49,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:52:49,520 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand 17 states. [2020-10-26 19:52:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:52,684 INFO L93 Difference]: Finished difference Result 200 states and 255 transitions. [2020-10-26 19:52:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:52:52,685 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-26 19:52:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:52,689 INFO L225 Difference]: With dead ends: 200 [2020-10-26 19:52:52,689 INFO L226 Difference]: Without dead ends: 183 [2020-10-26 19:52:52,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=372, Invalid=1434, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:52:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-26 19:52:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 132. [2020-10-26 19:52:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:52:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2020-10-26 19:52:52,729 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 54 [2020-10-26 19:52:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:52,730 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2020-10-26 19:52:52,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:52:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2020-10-26 19:52:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:52:52,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:52,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:52,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:52:52,734 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:52,735 INFO L82 PathProgramCache]: Analyzing trace with hash 667148305, now seen corresponding path program 1 times [2020-10-26 19:52:52,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:52,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072195325] [2020-10-26 19:52:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:52,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:52,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:52,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:53,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:53,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:53,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:54,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:57,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:52:57,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:52:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:52:57,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:52:57,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:57,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:57,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:57,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:57,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:57,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:57,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:57,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:57,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:57,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:57,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:57,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:57,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:57,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:57,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:57,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:52:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:57,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:57,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:57,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:57,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:57,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:57,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:57,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:57,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:57,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:52:57,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072195325] [2020-10-26 19:52:57,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:57,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:52:57,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076648239] [2020-10-26 19:52:57,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:52:57,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:57,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:52:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:57,863 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand 4 states. [2020-10-26 19:52:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:58,014 INFO L93 Difference]: Finished difference Result 193 states and 244 transitions. [2020-10-26 19:52:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:52:58,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-26 19:52:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:58,018 INFO L225 Difference]: With dead ends: 193 [2020-10-26 19:52:58,018 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:52:58,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:52:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:52:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:52:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2020-10-26 19:52:58,043 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 54 [2020-10-26 19:52:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:58,043 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2020-10-26 19:52:58,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:52:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2020-10-26 19:52:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:52:58,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:58,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:58,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:52:58,052 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1347120751, now seen corresponding path program 1 times [2020-10-26 19:52:58,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:58,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106449122] [2020-10-26 19:52:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:58,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:58,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:58,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:03,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:53:03,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:53:03,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:53:03,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:03,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:53:03,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 19:53:03,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:53:03,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:03,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:03,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:03,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:03,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:03,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:03,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:03,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:03,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:03,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:03,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:03,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:03,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:03,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:03,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:03,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:53:03,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106449122] [2020-10-26 19:53:03,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:03,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:53:03,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876475283] [2020-10-26 19:53:03,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:53:03,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:03,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:53:03,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:53:03,365 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand 8 states. [2020-10-26 19:53:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:04,061 INFO L93 Difference]: Finished difference Result 212 states and 260 transitions. [2020-10-26 19:53:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:53:04,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-26 19:53:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:04,063 INFO L225 Difference]: With dead ends: 212 [2020-10-26 19:53:04,064 INFO L226 Difference]: Without dead ends: 141 [2020-10-26 19:53:04,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:53:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-26 19:53:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2020-10-26 19:53:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:53:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2020-10-26 19:53:04,102 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 57 [2020-10-26 19:53:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:04,102 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2020-10-26 19:53:04,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:53:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2020-10-26 19:53:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:53:04,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:04,108 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:04,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:53:04,108 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:04,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1795320736, now seen corresponding path program 2 times [2020-10-26 19:53:04,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:04,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303895576] [2020-10-26 19:53:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:04,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:08,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:09,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:09,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:09,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:09,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:53:09,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:53:09,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:53:09,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:09,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:53:09,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:09,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 19:53:09,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:09,452 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2020-10-26 19:53:09,573 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2020-10-26 19:53:10,256 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-10-26 19:53:10,423 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2020-10-26 19:53:10,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:10,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:10,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:10,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:10,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:10,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:10,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:10,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:10,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:10,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:10,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:10,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:10,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:10,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:10,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:53:10,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:53:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:53:10,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:10,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:53:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:10,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:10,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:10,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:10,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:10,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:53:10,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:10,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:10,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:10,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:10,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:10,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:53:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:10,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:10,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:10,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:10,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:10,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:53:10,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:10,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:10,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:10,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:53:10,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303895576] [2020-10-26 19:53:10,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:10,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:53:10,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827817266] [2020-10-26 19:53:10,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:53:10,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:10,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:53:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:53:10,800 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand 16 states. [2020-10-26 19:53:12,187 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-26 19:53:12,365 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-26 19:53:12,621 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-26 19:53:12,913 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-26 19:53:13,166 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-26 19:53:13,437 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-26 19:53:13,918 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-26 19:53:14,174 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-26 19:53:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:15,227 INFO L93 Difference]: Finished difference Result 200 states and 237 transitions. [2020-10-26 19:53:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:53:15,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-26 19:53:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:15,231 INFO L225 Difference]: With dead ends: 200 [2020-10-26 19:53:15,231 INFO L226 Difference]: Without dead ends: 183 [2020-10-26 19:53:15,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:53:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-26 19:53:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2020-10-26 19:53:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:53:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2020-10-26 19:53:15,267 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 63 [2020-10-26 19:53:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:15,268 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2020-10-26 19:53:15,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:53:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2020-10-26 19:53:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:53:15,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:15,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:15,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:53:15,271 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2105279774, now seen corresponding path program 1 times [2020-10-26 19:53:15,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:15,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385663345] [2020-10-26 19:53:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:15,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:16,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:17,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:17,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:17,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:20,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:53:20,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:53:20,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:53:20,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:20,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:53:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:53:20,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:20,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:20,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:20,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:20,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:20,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:20,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:20,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:20,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:20,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:20,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:20,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:20,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:20,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:20,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:53:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:20,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:20,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:20,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:20,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:20,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:20,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:20,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:20,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:20,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:20,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:53:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:20,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:20,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:20,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:20,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:20,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:20,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:53:20,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385663345] [2020-10-26 19:53:20,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:53:20,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:53:20,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975815417] [2020-10-26 19:53:20,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:53:20,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:53:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:20,387 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand 4 states. [2020-10-26 19:53:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:20,544 INFO L93 Difference]: Finished difference Result 183 states and 214 transitions. [2020-10-26 19:53:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:53:20,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-26 19:53:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:20,547 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:53:20,547 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:53:20,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:53:20,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-26 19:53:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:53:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2020-10-26 19:53:20,576 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 63 [2020-10-26 19:53:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:20,576 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2020-10-26 19:53:20,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:53:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2020-10-26 19:53:20,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:53:20,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:20,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:20,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:53:20,587 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1024858410, now seen corresponding path program 2 times [2020-10-26 19:53:20,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:20,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91825599] [2020-10-26 19:53:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:20,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:23,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:24,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:24,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:25,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:25,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:25,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:53:25,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:53:25,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-26 19:53:25,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:25,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:53:25,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:25,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:53:25,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,587 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2020-10-26 19:53:26,748 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2020-10-26 19:53:27,097 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 26 [2020-10-26 19:53:27,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:27,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:27,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:27,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:27,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:27,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:27,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:27,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:27,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:27,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:27,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:27,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:27,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:27,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:27,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:27,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:27,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:53:27,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:53:27,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91825599] [2020-10-26 19:53:27,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:27,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:53:27,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865539361] [2020-10-26 19:53:27,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:53:27,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:27,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:53:27,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:53:27,818 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand 16 states. [2020-10-26 19:53:29,097 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-26 19:53:29,398 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-26 19:53:29,949 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-26 19:53:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:31,899 INFO L93 Difference]: Finished difference Result 234 states and 279 transitions. [2020-10-26 19:53:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:53:31,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-26 19:53:31,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:31,903 INFO L225 Difference]: With dead ends: 234 [2020-10-26 19:53:31,903 INFO L226 Difference]: Without dead ends: 217 [2020-10-26 19:53:31,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:53:31,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-26 19:53:31,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 152. [2020-10-26 19:53:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-26 19:53:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 178 transitions. [2020-10-26 19:53:31,934 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 178 transitions. Word has length 61 [2020-10-26 19:53:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:31,935 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 178 transitions. [2020-10-26 19:53:31,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:53:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 178 transitions. [2020-10-26 19:53:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:53:31,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:31,936 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:31,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:53:31,937 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:31,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash 216183599, now seen corresponding path program 3 times [2020-10-26 19:53:31,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:31,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590728153] [2020-10-26 19:53:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:33,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:34,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:34,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:36,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:53:36,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:53:36,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:53:36,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:36,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:53:36,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:53:36,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:53:36,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:37,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:37,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:37,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:37,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:37,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:37,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:37,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:37,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:37,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:37,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:53:37,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:53:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:53:37,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:53:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:37,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:37,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:37,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:37,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:37,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:37,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:53:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:37,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:37,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:37,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:37,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:37,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:37,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:37,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:53:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:37,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:37,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:37,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:37,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:37,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:37,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:37,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:53:37,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590728153] [2020-10-26 19:53:37,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:37,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:53:37,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282994941] [2020-10-26 19:53:37,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:53:37,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:37,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:53:37,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:53:37,998 INFO L87 Difference]: Start difference. First operand 152 states and 178 transitions. Second operand 21 states. [2020-10-26 19:53:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:41,042 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2020-10-26 19:53:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:53:41,043 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-10-26 19:53:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:41,046 INFO L225 Difference]: With dead ends: 250 [2020-10-26 19:53:41,046 INFO L226 Difference]: Without dead ends: 247 [2020-10-26 19:53:41,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=435, Invalid=2535, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:53:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-26 19:53:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 198. [2020-10-26 19:53:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-26 19:53:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 234 transitions. [2020-10-26 19:53:41,079 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 234 transitions. Word has length 72 [2020-10-26 19:53:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:41,080 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 234 transitions. [2020-10-26 19:53:41,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:53:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 234 transitions. [2020-10-26 19:53:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:53:41,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:41,081 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:41,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:53:41,081 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2061550765, now seen corresponding path program 1 times [2020-10-26 19:53:41,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:41,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989023888] [2020-10-26 19:53:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:46,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:46,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:53:46,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:53:46,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:53:46,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:46,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:46,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:53:46,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:53:46,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:46,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:46,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:46,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:46,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:46,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:46,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:46,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:46,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:46,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:46,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:46,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:46,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:46,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:46,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:46,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:46,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:46,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:46,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:46,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:46,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:46,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:46,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:53:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:46,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:46,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:46,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:46,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:46,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:46,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:46,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:46,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:53:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:46,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:46,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:46,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:46,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:46,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:46,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:46,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:46,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:53:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:46,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:46,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:46,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:46,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:46,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:46,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:46,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:46,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:46,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-26 19:53:46,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989023888] [2020-10-26 19:53:46,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:53:46,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:53:46,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281691001] [2020-10-26 19:53:46,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:53:46,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:46,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:53:46,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:46,205 INFO L87 Difference]: Start difference. First operand 198 states and 234 transitions. Second operand 4 states. [2020-10-26 19:53:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:46,448 INFO L93 Difference]: Finished difference Result 245 states and 290 transitions. [2020-10-26 19:53:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:53:46,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-26 19:53:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:46,454 INFO L225 Difference]: With dead ends: 245 [2020-10-26 19:53:46,454 INFO L226 Difference]: Without dead ends: 175 [2020-10-26 19:53:46,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-26 19:53:46,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-26 19:53:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-26 19:53:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2020-10-26 19:53:46,505 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 72 [2020-10-26 19:53:46,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:46,506 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2020-10-26 19:53:46,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:53:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2020-10-26 19:53:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:53:46,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:46,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:46,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:53:46,508 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:46,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:46,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1609436763, now seen corresponding path program 4 times [2020-10-26 19:53:46,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:46,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645781068] [2020-10-26 19:53:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:48,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:51,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:51,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:51,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:51,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:51,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:53:51,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:53:51,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 19:53:51,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:53:51,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:51,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:53:51,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:52,365 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2020-10-26 19:53:52,528 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 32 [2020-10-26 19:53:52,652 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2020-10-26 19:53:52,837 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2020-10-26 19:53:52,978 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-10-26 19:53:53,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:53,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:53,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:53,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:53,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:53,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:53,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:53,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:53:53,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:53:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:53:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:53:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:53,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:53,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:53,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:53,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:53,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:53,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:53,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:53,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:53:53,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645781068] [2020-10-26 19:53:53,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:53,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:53:53,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527251628] [2020-10-26 19:53:53,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:53:53,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:53,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:53:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:53:53,678 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 20 states. [2020-10-26 19:53:55,544 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-26 19:53:56,369 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-26 19:53:56,656 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-26 19:53:56,976 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-26 19:53:57,248 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-26 19:53:57,499 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-26 19:53:57,686 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-26 19:53:57,945 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-26 19:53:58,315 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-26 19:53:58,818 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-26 19:53:59,292 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-26 19:53:59,800 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-26 19:54:00,178 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:54:00,426 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-26 19:54:00,688 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-26 19:54:00,986 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-26 19:54:01,477 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-26 19:54:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:01,699 INFO L93 Difference]: Finished difference Result 281 states and 332 transitions. [2020-10-26 19:54:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:54:01,701 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-10-26 19:54:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:01,703 INFO L225 Difference]: With dead ends: 281 [2020-10-26 19:54:01,703 INFO L226 Difference]: Without dead ends: 264 [2020-10-26 19:54:01,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=439, Invalid=2423, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:54:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-26 19:54:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 199. [2020-10-26 19:54:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-26 19:54:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 230 transitions. [2020-10-26 19:54:01,742 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 230 transitions. Word has length 70 [2020-10-26 19:54:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:01,742 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 230 transitions. [2020-10-26 19:54:01,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:54:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 230 transitions. [2020-10-26 19:54:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:54:01,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:01,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:01,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:54:01,744 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:01,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2066410727, now seen corresponding path program 3 times [2020-10-26 19:54:01,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:01,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373149223] [2020-10-26 19:54:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:01,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:01,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:06,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:06,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:54:06,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:54:06,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:54:06,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:06,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:54:06,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 19:54:06,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:54:06,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:07,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:07,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:07,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:07,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:07,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:07,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:54:07,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:07,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:07,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:07,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:07,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:07,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:07,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:54:07,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:07,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:07,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:07,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:07,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:54:07,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373149223] [2020-10-26 19:54:07,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:07,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:54:07,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607955829] [2020-10-26 19:54:07,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:54:07,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:54:07,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:54:07,213 INFO L87 Difference]: Start difference. First operand 199 states and 230 transitions. Second operand 10 states. [2020-10-26 19:54:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:08,618 INFO L93 Difference]: Finished difference Result 394 states and 463 transitions. [2020-10-26 19:54:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:54:08,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-26 19:54:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:08,622 INFO L225 Difference]: With dead ends: 394 [2020-10-26 19:54:08,622 INFO L226 Difference]: Without dead ends: 250 [2020-10-26 19:54:08,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:54:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-26 19:54:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 208. [2020-10-26 19:54:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-26 19:54:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 237 transitions. [2020-10-26 19:54:08,677 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 237 transitions. Word has length 73 [2020-10-26 19:54:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:08,677 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 237 transitions. [2020-10-26 19:54:08,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:54:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 237 transitions. [2020-10-26 19:54:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:54:08,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:08,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:08,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:54:08,679 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:08,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1078283695, now seen corresponding path program 5 times [2020-10-26 19:54:08,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:08,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344131730] [2020-10-26 19:54:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:08,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:08,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:08,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:09,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:09,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:09,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:10,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:10,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:10,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-26 19:54:13,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:14,350 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-26 19:54:15,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:15,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:15,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:15,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:15,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:54:15,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:15,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:15,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:15,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:15,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:15,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:15,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:15,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:15,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:54:15,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:15,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:15,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:15,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:15,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:15,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:54:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:15,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:15,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:15,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:15,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:15,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:15,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:15,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:15,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:54:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:15,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:15,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:15,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:15,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:54:15,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:15,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 19:54:15,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344131730] [2020-10-26 19:54:15,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:15,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:54:15,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123080491] [2020-10-26 19:54:15,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:54:15,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:15,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:54:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:54:15,226 INFO L87 Difference]: Start difference. First operand 208 states and 237 transitions. Second operand 18 states. [2020-10-26 19:54:16,474 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-26 19:54:17,096 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-26 19:54:17,250 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-26 19:54:17,416 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-26 19:54:18,231 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-26 19:54:18,559 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-26 19:54:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:21,179 INFO L93 Difference]: Finished difference Result 359 states and 422 transitions. [2020-10-26 19:54:21,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:54:21,180 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-26 19:54:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:21,183 INFO L225 Difference]: With dead ends: 359 [2020-10-26 19:54:21,183 INFO L226 Difference]: Without dead ends: 318 [2020-10-26 19:54:21,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=698, Invalid=2842, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:54:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-26 19:54:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 224. [2020-10-26 19:54:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-26 19:54:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 255 transitions. [2020-10-26 19:54:21,243 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 255 transitions. Word has length 75 [2020-10-26 19:54:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:21,244 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 255 transitions. [2020-10-26 19:54:21,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:54:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 255 transitions. [2020-10-26 19:54:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:54:21,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:21,246 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:21,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:54:21,246 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash -918434496, now seen corresponding path program 6 times [2020-10-26 19:54:21,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:21,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662998321] [2020-10-26 19:54:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:21,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:21,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:21,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:21,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:25,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:54:26,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:54:26,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:54:26,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:54:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:54:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-26 19:54:26,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:26,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:26,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:54:26,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:26,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:26,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:26,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:26,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:54:26,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:26,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:54:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:26,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:26,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:26,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:26,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:26,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:26,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:54:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:26,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:26,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:26,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:26,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:26,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:26,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:54:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:26,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:26,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:26,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:26,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:26,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:26,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:54:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:26,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:26,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:26,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:26,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:54:26,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662998321] [2020-10-26 19:54:26,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:26,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:54:26,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434758842] [2020-10-26 19:54:26,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:54:26,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:54:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:54:26,822 INFO L87 Difference]: Start difference. First operand 224 states and 255 transitions. Second operand 15 states. [2020-10-26 19:54:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:28,264 INFO L93 Difference]: Finished difference Result 265 states and 305 transitions. [2020-10-26 19:54:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:54:28,266 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2020-10-26 19:54:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:28,269 INFO L225 Difference]: With dead ends: 265 [2020-10-26 19:54:28,269 INFO L226 Difference]: Without dead ends: 248 [2020-10-26 19:54:28,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:54:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-26 19:54:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 224. [2020-10-26 19:54:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-26 19:54:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 254 transitions. [2020-10-26 19:54:28,314 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 254 transitions. Word has length 81 [2020-10-26 19:54:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:28,315 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 254 transitions. [2020-10-26 19:54:28,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:54:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 254 transitions. [2020-10-26 19:54:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:54:28,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:28,316 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:28,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:54:28,316 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2096669122, now seen corresponding path program 7 times [2020-10-26 19:54:28,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:28,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036783188] [2020-10-26 19:54:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:28,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:28,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:28,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:28,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:28,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:30,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:30,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:30,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:33,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:54:33,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:54:33,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:54:33,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:33,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:54:33,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:54:33,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:54:33,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:33,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:33,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:33,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:33,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:33,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:33,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:33,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:33,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:33,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:33,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:33,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:33,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:54:33,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:54:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:54:33,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:33,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:54:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:33,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:33,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:33,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:33,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:33,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:33,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:33,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:33,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:33,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:54:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:33,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:33,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:33,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:33,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:33,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:33,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:33,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:54:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:33,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:33,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:33,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:33,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:33,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:33,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:33,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:33,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:33,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:33,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:54:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:33,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:33,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:33,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:33,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:33,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:33,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:54:33,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036783188] [2020-10-26 19:54:33,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:33,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:54:33,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799674482] [2020-10-26 19:54:33,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:54:33,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:33,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:54:33,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:54:33,676 INFO L87 Difference]: Start difference. First operand 224 states and 254 transitions. Second operand 14 states. [2020-10-26 19:54:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:35,273 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-10-26 19:54:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:54:35,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-26 19:54:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:35,277 INFO L225 Difference]: With dead ends: 263 [2020-10-26 19:54:35,277 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:54:35,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:54:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:54:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 175. [2020-10-26 19:54:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-26 19:54:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 191 transitions. [2020-10-26 19:54:35,315 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 191 transitions. Word has length 81 [2020-10-26 19:54:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:35,315 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 191 transitions. [2020-10-26 19:54:35,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:54:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 191 transitions. [2020-10-26 19:54:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:54:35,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:35,317 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:35,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:54:35,317 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:35,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1461774292, now seen corresponding path program 4 times [2020-10-26 19:54:35,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:35,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73320549] [2020-10-26 19:54:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:37,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:38,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:40,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:40,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:54:40,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:54:40,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:54:40,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:54:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:54:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 19:54:40,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:41,422 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-26 19:54:41,873 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-26 19:54:42,357 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 43 [2020-10-26 19:54:42,531 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-26 19:54:42,862 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2020-10-26 19:54:43,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:43,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:43,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:43,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:43,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:43,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:43,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:43,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:43,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:43,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:43,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:43,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:43,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:43,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:43,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:43,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:43,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:54:43,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:54:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:54:43,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:54:43,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73320549] [2020-10-26 19:54:43,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:43,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:54:43,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360574759] [2020-10-26 19:54:43,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:54:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:43,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:54:43,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:54:43,906 INFO L87 Difference]: Start difference. First operand 175 states and 191 transitions. Second operand 21 states. [2020-10-26 19:54:45,251 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-26 19:54:45,489 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-26 19:54:45,722 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-26 19:54:45,940 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-26 19:54:46,319 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-26 19:54:46,536 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-26 19:54:46,766 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-26 19:54:47,258 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-26 19:54:47,591 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-26 19:54:47,826 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-26 19:54:48,216 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-26 19:54:48,497 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 19:54:49,412 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-26 19:54:49,641 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-26 19:54:50,193 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-26 19:54:50,583 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-26 19:54:51,020 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-26 19:54:51,332 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-26 19:54:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:51,597 INFO L93 Difference]: Finished difference Result 313 states and 358 transitions. [2020-10-26 19:54:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:54:51,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-10-26 19:54:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:51,602 INFO L225 Difference]: With dead ends: 313 [2020-10-26 19:54:51,603 INFO L226 Difference]: Without dead ends: 296 [2020-10-26 19:54:51,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:54:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-26 19:54:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 218. [2020-10-26 19:54:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-26 19:54:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 242 transitions. [2020-10-26 19:54:51,651 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 242 transitions. Word has length 77 [2020-10-26 19:54:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:51,651 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 242 transitions. [2020-10-26 19:54:51,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:54:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 242 transitions. [2020-10-26 19:54:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:54:51,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:51,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:51,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:54:51,653 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1294052807, now seen corresponding path program 8 times [2020-10-26 19:54:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:51,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120185813] [2020-10-26 19:54:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:51,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:51,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:51,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:52,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:52,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:56,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:56,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:56,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:54:56,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:54:56,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:54:56,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:54:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:54:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 19:54:56,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:57,271 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-26 19:54:57,560 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 38 [2020-10-26 19:54:57,860 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2020-10-26 19:54:58,099 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-10-26 19:54:58,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:58,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:58,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:58,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:58,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:58,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:58,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:58,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:58,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:58,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:58,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:58,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:58,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:58,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:58,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:54:58,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:58,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:58,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:58,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:58,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:58,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:54:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:58,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:58,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:58,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:58,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:54:58,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:58,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:58,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:58,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:58,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:54:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:58,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:58,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:58,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:58,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:58,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:54:58,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:58,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:58,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:58,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:58,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-26 19:54:58,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120185813] [2020-10-26 19:54:58,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:58,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:54:58,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140667072] [2020-10-26 19:54:58,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:54:58,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:58,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:54:58,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:54:58,836 INFO L87 Difference]: Start difference. First operand 218 states and 242 transitions. Second operand 17 states. [2020-10-26 19:55:00,144 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-26 19:55:00,803 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-26 19:55:01,643 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-26 19:55:02,352 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-26 19:55:02,654 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-26 19:55:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:02,688 INFO L93 Difference]: Finished difference Result 235 states and 262 transitions. [2020-10-26 19:55:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:55:02,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-10-26 19:55:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:02,691 INFO L225 Difference]: With dead ends: 235 [2020-10-26 19:55:02,691 INFO L226 Difference]: Without dead ends: 212 [2020-10-26 19:55:02,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:55:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-26 19:55:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 198. [2020-10-26 19:55:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-26 19:55:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 218 transitions. [2020-10-26 19:55:02,730 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 218 transitions. Word has length 83 [2020-10-26 19:55:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:02,730 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 218 transitions. [2020-10-26 19:55:02,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:55:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 218 transitions. [2020-10-26 19:55:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:55:02,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:02,732 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:02,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:55:02,733 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash 197477189, now seen corresponding path program 9 times [2020-10-26 19:55:02,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:02,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489178606] [2020-10-26 19:55:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:02,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:03,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:03,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:03,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:03,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:03,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:06,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:06,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:07,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:07,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:55:07,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:55:07,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:55:07,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:07,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:55:07,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:55:07,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:55:07,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:08,538 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2020-10-26 19:55:08,742 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-10-26 19:55:09,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:09,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:09,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:09,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:09,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:09,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:09,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:09,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:09,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:55:09,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:55:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:55:09,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:09,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:55:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:09,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:09,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:09,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:09,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:09,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:09,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:09,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:09,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:55:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:09,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:09,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:09,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:09,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:55:09,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:09,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:09,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:09,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:09,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:09,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:55:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:09,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:09,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:09,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:09,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:09,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:09,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:09,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:09,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:09,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:09,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 19:55:09,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489178606] [2020-10-26 19:55:09,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:09,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:55:09,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345020760] [2020-10-26 19:55:09,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:55:09,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:09,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:55:09,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:55:09,448 INFO L87 Difference]: Start difference. First operand 198 states and 218 transitions. Second operand 24 states. [2020-10-26 19:55:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:13,640 INFO L93 Difference]: Finished difference Result 264 states and 299 transitions. [2020-10-26 19:55:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:55:13,641 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2020-10-26 19:55:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:13,643 INFO L225 Difference]: With dead ends: 264 [2020-10-26 19:55:13,644 INFO L226 Difference]: Without dead ends: 261 [2020-10-26 19:55:13,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=506, Invalid=2916, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:55:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-26 19:55:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 221. [2020-10-26 19:55:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-26 19:55:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 247 transitions. [2020-10-26 19:55:13,693 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 247 transitions. Word has length 88 [2020-10-26 19:55:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:13,694 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 247 transitions. [2020-10-26 19:55:13,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:55:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 247 transitions. [2020-10-26 19:55:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:55:13,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:13,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:13,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:55:13,696 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:13,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:13,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2278400, now seen corresponding path program 10 times [2020-10-26 19:55:13,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:13,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885695803] [2020-10-26 19:55:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:13,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:13,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:13,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:14,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:18,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:18,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:18,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:55:18,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:55:18,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:55:18,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:18,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:55:18,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 19:55:18,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:55:18,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:19,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:19,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:19,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:19,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:19,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:19,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:19,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:19,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:19,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:19,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:19,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:19,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:19,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:19,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:55:19,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:19,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:19,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:19,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:19,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:19,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:55:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:19,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:19,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:19,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:19,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:19,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:55:19,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:19,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:19,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:55:19,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:19,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:19,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:55:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:19,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:19,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:19,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:19,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:19,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:55:19,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:55:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:55:19,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885695803] [2020-10-26 19:55:19,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:19,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:55:19,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063907829] [2020-10-26 19:55:19,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:55:19,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:55:19,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:55:19,080 INFO L87 Difference]: Start difference. First operand 221 states and 247 transitions. Second operand 10 states. [2020-10-26 19:55:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:20,492 INFO L93 Difference]: Finished difference Result 302 states and 341 transitions. [2020-10-26 19:55:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:55:20,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-10-26 19:55:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:20,496 INFO L225 Difference]: With dead ends: 302 [2020-10-26 19:55:20,496 INFO L226 Difference]: Without dead ends: 218 [2020-10-26 19:55:20,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:55:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-26 19:55:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2020-10-26 19:55:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-26 19:55:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2020-10-26 19:55:20,539 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 87 [2020-10-26 19:55:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:20,539 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2020-10-26 19:55:20,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:55:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2020-10-26 19:55:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:55:20,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:20,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:20,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:55:20,541 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:20,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:20,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2095840709, now seen corresponding path program 11 times [2020-10-26 19:55:20,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:20,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245466417] [2020-10-26 19:55:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:20,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:21,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:22,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:22,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:22,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:22,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:23,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:24,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:24,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:25,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:25,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:55:25,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:55:25,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:55:25,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:25,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:55:25,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:55:25,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:55:25,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:26,399 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-26 19:55:26,643 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-26 19:55:26,902 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-26 19:55:27,053 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2020-10-26 19:55:27,262 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2020-10-26 19:55:27,491 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-10-26 19:55:27,720 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-26 19:55:27,885 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-26 19:55:28,085 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 21 [2020-10-26 19:55:28,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:28,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:28,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:28,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:28,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:28,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:28,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:28,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:28,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:28,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:28,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:28,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:28,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:55:28,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:55:28,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:55:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:28,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:55:28,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:28,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-26 19:55:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:28,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:28,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:28,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:28,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:28,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:55:28,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:28,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:28,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:28,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:28,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:55:28,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245466417] [2020-10-26 19:55:28,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:28,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:55:28,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700928962] [2020-10-26 19:55:28,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:55:28,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:55:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:55:28,876 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand 23 states. [2020-10-26 19:55:30,549 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-26 19:55:30,790 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-26 19:55:31,018 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-26 19:55:31,291 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-26 19:55:31,473 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-26 19:55:31,782 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-26 19:55:32,132 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 19:55:32,476 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-26 19:55:32,801 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:55:33,054 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-26 19:55:33,414 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-26 19:55:33,651 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-26 19:55:33,906 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-26 19:55:34,321 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2020-10-26 19:55:34,593 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-10-26 19:55:35,014 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-26 19:55:35,557 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-26 19:55:35,751 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:55:36,108 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-26 19:55:36,716 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-26 19:55:37,293 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-26 19:55:37,745 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-26 19:55:38,059 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:55:38,348 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-26 19:55:38,702 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-26 19:55:39,297 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-26 19:55:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:39,567 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2020-10-26 19:55:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:55:39,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-10-26 19:55:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:39,571 INFO L225 Difference]: With dead ends: 271 [2020-10-26 19:55:39,571 INFO L226 Difference]: Without dead ends: 254 [2020-10-26 19:55:39,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 10 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=526, Invalid=3256, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:55:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-26 19:55:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 225. [2020-10-26 19:55:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-26 19:55:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 246 transitions. [2020-10-26 19:55:39,614 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 246 transitions. Word has length 86 [2020-10-26 19:55:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:39,614 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 246 transitions. [2020-10-26 19:55:39,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:55:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 246 transitions. [2020-10-26 19:55:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:55:39,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:39,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:39,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:55:39,616 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1337577667, now seen corresponding path program 5 times [2020-10-26 19:55:39,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:39,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353676609] [2020-10-26 19:55:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:39,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:39,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:44,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:44,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:55:44,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:55:44,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:55:44,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:55:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 19:55:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:55:44,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:45,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:45,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:45,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:45,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:45,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:45,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:55:45,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:45,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:45,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:45,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:45,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:45,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:45,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:45,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:45,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:55:45,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-26 19:55:45,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353676609] [2020-10-26 19:55:45,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:45,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:55:45,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171837832] [2020-10-26 19:55:45,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:55:45,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:45,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:55:45,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:55:45,132 INFO L87 Difference]: Start difference. First operand 225 states and 246 transitions. Second operand 12 states. [2020-10-26 19:55:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:47,199 INFO L93 Difference]: Finished difference Result 394 states and 446 transitions. [2020-10-26 19:55:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:55:47,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-10-26 19:55:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:47,204 INFO L225 Difference]: With dead ends: 394 [2020-10-26 19:55:47,204 INFO L226 Difference]: Without dead ends: 291 [2020-10-26 19:55:47,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:55:47,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-26 19:55:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 234. [2020-10-26 19:55:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-26 19:55:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 253 transitions. [2020-10-26 19:55:47,259 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 253 transitions. Word has length 89 [2020-10-26 19:55:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:47,260 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 253 transitions. [2020-10-26 19:55:47,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:55:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 253 transitions. [2020-10-26 19:55:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:55:47,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:47,261 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:47,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:55:47,261 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1232013846, now seen corresponding path program 12 times [2020-10-26 19:55:47,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:47,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444090710] [2020-10-26 19:55:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:47,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:47,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:47,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:52,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:52,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:55:52,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:55:52,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:55:52,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:55:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:55:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 19:55:52,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:52,847 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-26 19:55:53,024 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-26 19:55:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:53,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:53,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:53,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:55:53,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:53,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:53,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:53,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:53,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:53,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:53,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:55:53,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:53,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:55:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:53,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:53,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:53,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:55:53,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:53,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:53,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:53,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:53,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:53,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:55:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:53,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:53,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:53,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:53,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:55:53,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:53,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:53,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:53,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:53,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:53,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:55:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:53,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:53,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:53,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:53,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:55:53,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:53,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:53,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:55:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:53,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:53,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:53,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:53,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:55:53,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:53,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:53,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:55:53,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:53,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-26 19:55:53,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444090710] [2020-10-26 19:55:53,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:53,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:55:53,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492091157] [2020-10-26 19:55:53,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:55:53,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:55:53,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:55:53,654 INFO L87 Difference]: Start difference. First operand 234 states and 253 transitions. Second operand 19 states. [2020-10-26 19:55:55,097 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-26 19:55:55,574 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-26 19:55:56,178 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-26 19:55:56,673 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-26 19:55:56,821 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-26 19:55:57,076 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-26 19:55:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:58,540 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2020-10-26 19:55:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:55:58,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-10-26 19:55:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:58,544 INFO L225 Difference]: With dead ends: 318 [2020-10-26 19:55:58,544 INFO L226 Difference]: Without dead ends: 273 [2020-10-26 19:55:58,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=442, Invalid=1910, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:55:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-26 19:55:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 265. [2020-10-26 19:55:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-26 19:55:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 296 transitions. [2020-10-26 19:55:58,616 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 296 transitions. Word has length 97 [2020-10-26 19:55:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:58,617 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 296 transitions. [2020-10-26 19:55:58,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:55:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 296 transitions. [2020-10-26 19:55:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:55:58,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:58,618 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:58,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:55:58,619 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:58,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1783089772, now seen corresponding path program 13 times [2020-10-26 19:55:58,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:58,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420379171] [2020-10-26 19:55:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:58,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:59,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:59,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:59,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:59,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:00,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:00,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:01,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:02,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:03,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:03,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:03,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:56:03,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:56:03,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:56:03,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:03,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:56:03,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:56:03,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 19:56:03,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0