/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=BIGGEST --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 -i ../../../trunk/examples/svcomp/heap-data/shared_mem1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:38:54,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:38:54,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:38:54,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:38:54,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:38:54,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:38:54,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:38:54,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:38:54,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:38:54,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:38:54,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:38:54,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:38:54,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:38:54,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:38:54,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:38:54,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:38:54,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:38:54,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:38:54,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:38:54,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:38:54,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:38:54,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:38:54,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:38:54,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:38:54,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:38:54,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:38:54,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:38:54,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:38:54,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:38:54,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:38:54,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:38:54,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:38:54,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:38:54,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:38:54,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:38:54,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:38:54,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:38:54,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:38:54,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:38:54,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:38:54,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:38:54,197 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 [2020-10-12 15:38:54,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:38:54,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:38:54,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:38:54,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:38:54,238 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:38:54,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:38:54,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:38:54,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:38:54,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:38:54,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:38:54,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:38:54,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:38:54,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:38:54,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:38:54,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:38:54,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:38:54,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:38:54,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:38:54,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:38:54,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:38:54,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:38:54,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:38:54,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:38:54,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:38:54,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:38:54,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:38:54,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:38:54,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:38:54,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:38:54,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:38:54,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:38:54,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:38:54,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:38:54,615 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:38:54,615 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:38:54,616 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-12 15:38:54,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9c483837/dd6f20a0f340420c991b325b4c19d01a/FLAGf9ff9b571 [2020-10-12 15:38:55,236 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:38:55,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-12 15:38:55,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9c483837/dd6f20a0f340420c991b325b4c19d01a/FLAGf9ff9b571 [2020-10-12 15:38:55,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9c483837/dd6f20a0f340420c991b325b4c19d01a [2020-10-12 15:38:55,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:38:55,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:38:55,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:38:55,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:38:55,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:38:55,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:38:55" (1/1) ... [2020-10-12 15:38:55,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7503bbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:55, skipping insertion in model container [2020-10-12 15:38:55,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:38:55" (1/1) ... [2020-10-12 15:38:55,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:38:55,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:38:56,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:38:56,073 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:38:56,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:38:56,171 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:38:56,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56 WrapperNode [2020-10-12 15:38:56,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:38:56,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:38:56,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:38:56,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:38:56,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (1/1) ... [2020-10-12 15:38:56,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (1/1) ... [2020-10-12 15:38:56,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (1/1) ... [2020-10-12 15:38:56,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (1/1) ... [2020-10-12 15:38:56,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (1/1) ... [2020-10-12 15:38:56,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (1/1) ... [2020-10-12 15:38:56,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (1/1) ... [2020-10-12 15:38:56,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:38:56,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:38:56,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:38:56,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:38:56,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (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 [2020-10-12 15:38:56,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:38:56,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:38:56,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:38:56,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:38:56,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:38:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:38:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:38:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:38:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:38:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:38:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:38:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:38:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:38:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:38:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:38:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:38:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:38:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:38:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:38:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:38:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:38:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:38:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:38:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:38:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:38:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:38:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:38:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:38:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:38:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:38:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:38:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:38:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:38:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:38:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:38:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:38:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:38:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:38:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:38:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:38:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:38:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:38:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:38:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:38:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:38:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:38:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:38:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:38:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:38:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:38:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:38:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:38:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:38:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:38:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:38:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:38:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:38:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:38:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:38:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:38:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:38:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:38:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:38:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:38:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:38:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:38:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:38:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:38:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:38:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:38:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:38:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:38:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:38:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:38:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:38:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:38:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:38:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:38:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:38:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:38:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:38:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:38:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:38:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:38:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:38:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:38:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:38:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:38:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:38:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:38:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:38:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:38:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:38:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:38:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:38:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:38:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:38:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:38:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:38:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:38:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:38:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:38:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:38:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:38:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:38:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:38:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:38:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:38:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:38:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:38:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:38:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:38:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:38:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:38:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:38:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:38:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:38:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:38:56,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:38:56,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:38:56,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:38:56,866 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:38:56,866 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 15:38:56,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:38:56 BoogieIcfgContainer [2020-10-12 15:38:56,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:38:56,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:38:56,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:38:56,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:38:56,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:38:55" (1/3) ... [2020-10-12 15:38:56,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd81133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:38:56, skipping insertion in model container [2020-10-12 15:38:56,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:56" (2/3) ... [2020-10-12 15:38:56,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd81133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:38:56, skipping insertion in model container [2020-10-12 15:38:56,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:38:56" (3/3) ... [2020-10-12 15:38:56,879 INFO L109 eAbstractionObserver]: Analyzing ICFG shared_mem1.i [2020-10-12 15:38:56,889 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:38:56,897 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:38:56,910 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:38:56,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:38:56,933 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:38:56,934 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:38:56,934 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:38:56,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:38:56,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:38:56,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:38:56,934 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:38:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-12 15:38:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 15:38:56,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:56,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:56,960 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash -53964180, now seen corresponding path program 1 times [2020-10-12 15:38:56,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:56,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112663862] [2020-10-12 15:38:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:57,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:57,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:38:57,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:57,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-12 15:38:57,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:57,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:57,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:57,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:38:57,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:38:57,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:57,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:57,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:57,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:38:57,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:57,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:57,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:57,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:57,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112663862] [2020-10-12 15:38:57,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:57,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:38:57,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797621925] [2020-10-12 15:38:57,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:38:57,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:57,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:38:57,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:57,828 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2020-10-12 15:38:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:58,112 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2020-10-12 15:38:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:38:58,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-12 15:38:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:58,125 INFO L225 Difference]: With dead ends: 51 [2020-10-12 15:38:58,125 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 15:38:58,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 15:38:58,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-10-12 15:38:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 15:38:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-10-12 15:38:58,172 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 14 [2020-10-12 15:38:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:58,172 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-10-12 15:38:58,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:38:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-10-12 15:38:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 15:38:58,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:58,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:58,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:38:58,174 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:58,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1423021147, now seen corresponding path program 1 times [2020-10-12 15:38:58,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:58,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546475750] [2020-10-12 15:38:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:58,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:58,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:58,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:38:58,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:58,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-12 15:38:58,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:38:58,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:58,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:58,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:58,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:58,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:58,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:58,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:58,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:58,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:58,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:58,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546475750] [2020-10-12 15:38:58,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:58,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:38:58,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798626218] [2020-10-12 15:38:58,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:38:58,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:58,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:38:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:58,679 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 7 states. [2020-10-12 15:38:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:58,990 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2020-10-12 15:38:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:38:58,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-12 15:38:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:58,992 INFO L225 Difference]: With dead ends: 38 [2020-10-12 15:38:58,992 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 15:38:58,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 15:38:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-12 15:38:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 15:38:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-12 15:38:59,000 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-10-12 15:38:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:59,000 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-12 15:38:59,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:38:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-12 15:38:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 15:38:59,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:59,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:59,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:38:59,002 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:59,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1424868189, now seen corresponding path program 1 times [2020-10-12 15:38:59,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:59,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810855769] [2020-10-12 15:38:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:59,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:59,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:38:59,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:38:59,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-12 15:38:59,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:59,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:59,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:59,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:38:59,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:59,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:59,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:59,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:59,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:59,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:38:59,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:59,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:59,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:59,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810855769] [2020-10-12 15:38:59,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:59,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:38:59,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759141459] [2020-10-12 15:38:59,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:38:59,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:59,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:38:59,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:38:59,661 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2020-10-12 15:38:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:59,915 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-12 15:38:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:38:59,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-12 15:38:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:59,917 INFO L225 Difference]: With dead ends: 41 [2020-10-12 15:38:59,917 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 15:38:59,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 15:38:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-12 15:38:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:38:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-10-12 15:38:59,924 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 15 [2020-10-12 15:38:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:59,924 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-10-12 15:38:59,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:38:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-10-12 15:38:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:38:59,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:59,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:59,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:38:59,926 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash -442037965, now seen corresponding path program 1 times [2020-10-12 15:38:59,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:59,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515633312] [2020-10-12 15:38:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:00,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:00,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:00,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:39:00,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:00,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-12 15:39:00,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:00,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:39:00,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:00,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:39:00,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:00,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:00,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:00,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:00,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:00,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:00,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:39:00,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:00,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:00,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:00,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:00,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:00,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515633312] [2020-10-12 15:39:00,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:00,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:39:00,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136755354] [2020-10-12 15:39:00,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:39:00,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:00,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:39:00,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:39:00,653 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 8 states. [2020-10-12 15:39:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:00,902 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-10-12 15:39:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:39:00,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-12 15:39:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:00,904 INFO L225 Difference]: With dead ends: 48 [2020-10-12 15:39:00,904 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:39:00,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:39:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-10-12 15:39:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 15:39:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-12 15:39:00,912 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2020-10-12 15:39:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:00,912 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-12 15:39:00,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:39:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-12 15:39:00,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:39:00,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:00,914 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:00,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:39:00,915 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash -442036043, now seen corresponding path program 1 times [2020-10-12 15:39:00,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:00,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717447909] [2020-10-12 15:39:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:00,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:01,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:39:01,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:01,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-12 15:39:01,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:01,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:39:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:39:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:01,545 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-12 15:39:01,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:01,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:01,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:01,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:01,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:39:01,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:01,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717447909] [2020-10-12 15:39:01,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:01,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:39:01,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904529563] [2020-10-12 15:39:01,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:39:01,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:01,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:39:01,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:39:01,670 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 8 states. [2020-10-12 15:39:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:01,819 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-10-12 15:39:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:39:01,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-12 15:39:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:01,821 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:39:01,821 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:39:01,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:39:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-10-12 15:39:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 15:39:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-10-12 15:39:01,829 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 18 [2020-10-12 15:39:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:01,829 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-10-12 15:39:01,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:39:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-10-12 15:39:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:39:01,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:01,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:01,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:39:01,831 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:01,831 INFO L82 PathProgramCache]: Analyzing trace with hash 389431748, now seen corresponding path program 1 times [2020-10-12 15:39:01,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:01,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520370766] [2020-10-12 15:39:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:01,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:02,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:39:02,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:02,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 907 [2020-10-12 15:39:02,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:39:02,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:02,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:02,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:02,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:02,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:02,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:02,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:02,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:02,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:02,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:02,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:02,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520370766] [2020-10-12 15:39:02,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:02,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:02,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791619688] [2020-10-12 15:39:02,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:02,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:02,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:02,996 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 9 states. [2020-10-12 15:39:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:03,554 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-12 15:39:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:03,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-12 15:39:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:03,556 INFO L225 Difference]: With dead ends: 53 [2020-10-12 15:39:03,556 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 15:39:03,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 15:39:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-12 15:39:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 15:39:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-10-12 15:39:03,564 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 20 [2020-10-12 15:39:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:03,564 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-10-12 15:39:03,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-10-12 15:39:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:39:03,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:03,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:03,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:39:03,566 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:03,567 INFO L82 PathProgramCache]: Analyzing trace with hash 389433670, now seen corresponding path program 1 times [2020-10-12 15:39:03,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:03,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239380571] [2020-10-12 15:39:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:03,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:04,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:39:04,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:39:04,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-12 15:39:04,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:04,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:04,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:39:04,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:04,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:04,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:04,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:04,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:04,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:04,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:04,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:39:04,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239380571] [2020-10-12 15:39:04,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:04,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:39:04,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326375261] [2020-10-12 15:39:04,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:39:04,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:39:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:39:04,667 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 8 states. [2020-10-12 15:39:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:05,009 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2020-10-12 15:39:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:39:05,010 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 15:39:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:05,011 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:39:05,011 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 15:39:05,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 15:39:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-12 15:39:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:39:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-12 15:39:05,019 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 20 [2020-10-12 15:39:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:05,019 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-12 15:39:05,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:39:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-12 15:39:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:39:05,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:05,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:05,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:39:05,021 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash 391278790, now seen corresponding path program 1 times [2020-10-12 15:39:05,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:05,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897318712] [2020-10-12 15:39:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:05,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:05,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:05,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:39:05,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:05,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-12 15:39:05,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:39:05,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:05,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:05,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:05,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:05,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:05,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:05,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:05,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:05,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:05,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897318712] [2020-10-12 15:39:05,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:05,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:05,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482634658] [2020-10-12 15:39:05,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:05,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:05,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:05,601 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 9 states. [2020-10-12 15:39:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:06,149 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-12 15:39:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:06,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-12 15:39:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:06,153 INFO L225 Difference]: With dead ends: 68 [2020-10-12 15:39:06,154 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:39:06,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:39:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2020-10-12 15:39:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:39:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-12 15:39:06,170 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 20 [2020-10-12 15:39:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:06,172 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-12 15:39:06,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-12 15:39:06,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:39:06,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:06,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:06,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:39:06,174 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:06,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:06,177 INFO L82 PathProgramCache]: Analyzing trace with hash 391280712, now seen corresponding path program 1 times [2020-10-12 15:39:06,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:06,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590535966] [2020-10-12 15:39:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:06,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:06,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:39:06,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:06,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-12 15:39:06,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:39:06,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:07,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:07,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:07,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:07,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:07,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:07,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:07,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:07,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:07,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:07,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:07,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590535966] [2020-10-12 15:39:07,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:07,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:07,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539213673] [2020-10-12 15:39:07,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:07,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:07,030 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 9 states. [2020-10-12 15:39:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:07,494 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-12 15:39:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:07,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-12 15:39:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:07,496 INFO L225 Difference]: With dead ends: 65 [2020-10-12 15:39:07,496 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:39:07,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:39:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-12 15:39:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:39:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-12 15:39:07,508 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 20 [2020-10-12 15:39:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:07,508 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-12 15:39:07,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-12 15:39:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:39:07,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:07,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:07,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:39:07,510 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:07,511 INFO L82 PathProgramCache]: Analyzing trace with hash -3593340, now seen corresponding path program 2 times [2020-10-12 15:39:07,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:07,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167451954] [2020-10-12 15:39:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:07,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:07,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:39:07,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:07,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-12 15:39:07,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:39:08,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:08,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:08,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:08,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:08,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:08,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:08,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:08,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:08,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:08,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167451954] [2020-10-12 15:39:08,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:08,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:08,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109105357] [2020-10-12 15:39:08,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:08,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:08,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:08,266 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 9 states. [2020-10-12 15:39:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:08,840 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-12 15:39:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:08,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-12 15:39:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:08,842 INFO L225 Difference]: With dead ends: 65 [2020-10-12 15:39:08,842 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:39:08,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:39:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-12 15:39:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:39:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-10-12 15:39:08,849 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 20 [2020-10-12 15:39:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:08,850 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-10-12 15:39:08,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-10-12 15:39:08,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:39:08,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:08,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:08,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:39:08,851 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash -167613014, now seen corresponding path program 1 times [2020-10-12 15:39:08,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:08,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868745863] [2020-10-12 15:39:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:08,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:09,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:39:09,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:09,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-12 15:39:09,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:39:09,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:09,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:09,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:09,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:09,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:09,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:09,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:09,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:09,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868745863] [2020-10-12 15:39:09,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:09,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:09,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66976658] [2020-10-12 15:39:09,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:09,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:09,733 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 10 states. [2020-10-12 15:39:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:10,014 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-12 15:39:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:39:10,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-12 15:39:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:10,015 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:39:10,016 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:39:10,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:39:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-10-12 15:39:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:39:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-12 15:39:10,029 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 23 [2020-10-12 15:39:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:10,029 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-12 15:39:10,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-12 15:39:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:39:10,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:10,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:10,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:39:10,033 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash -167611092, now seen corresponding path program 1 times [2020-10-12 15:39:10,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:10,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080594953] [2020-10-12 15:39:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:10,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:10,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:10,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:11,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:11,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:11,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:39:11,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:39:11,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-12 15:39:11,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:11,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:11,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:11,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:39:11,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:11,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:11,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:11,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:11,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:11,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:11,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:11,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:11,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:39:11,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080594953] [2020-10-12 15:39:11,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:11,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:11,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441796412] [2020-10-12 15:39:11,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:11,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:11,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:11,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:11,653 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 9 states. [2020-10-12 15:39:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:11,890 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2020-10-12 15:39:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:39:11,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-12 15:39:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:11,891 INFO L225 Difference]: With dead ends: 73 [2020-10-12 15:39:11,891 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:39:11,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:11,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:39:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-10-12 15:39:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 15:39:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-12 15:39:11,905 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 23 [2020-10-12 15:39:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:11,907 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-12 15:39:11,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-12 15:39:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:39:11,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:11,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:11,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:39:11,911 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash -165765972, now seen corresponding path program 1 times [2020-10-12 15:39:11,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:11,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118568275] [2020-10-12 15:39:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:11,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:12,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:12,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:39:12,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:12,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-12 15:39:12,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:12,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:12,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:12,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:39:12,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:12,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:12,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:12,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:12,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:12,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:12,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:12,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:12,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:12,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118568275] [2020-10-12 15:39:12,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:12,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:12,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573950138] [2020-10-12 15:39:12,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:12,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:12,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:12,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:12,678 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 10 states. [2020-10-12 15:39:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:13,076 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-12 15:39:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:13,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-12 15:39:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:13,078 INFO L225 Difference]: With dead ends: 79 [2020-10-12 15:39:13,078 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 15:39:13,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 15:39:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2020-10-12 15:39:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 15:39:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2020-10-12 15:39:13,093 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 23 [2020-10-12 15:39:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:13,093 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2020-10-12 15:39:13,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2020-10-12 15:39:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:39:13,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:13,094 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] [2020-10-12 15:39:13,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:39:13,095 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:13,095 INFO L82 PathProgramCache]: Analyzing trace with hash -165764050, now seen corresponding path program 1 times [2020-10-12 15:39:13,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:13,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717253947] [2020-10-12 15:39:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:13,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:13,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:39:13,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-12 15:39:13,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:39:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:14,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:14,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:14,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:14,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:14,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:14,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:14,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:14,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:14,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:14,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:14,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:14,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717253947] [2020-10-12 15:39:14,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:14,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:14,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400209292] [2020-10-12 15:39:14,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:14,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:14,101 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 10 states. [2020-10-12 15:39:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:14,557 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-12 15:39:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:14,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-12 15:39:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:14,558 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:39:14,558 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 15:39:14,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:14,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 15:39:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2020-10-12 15:39:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:39:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-12 15:39:14,565 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 23 [2020-10-12 15:39:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:14,565 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-12 15:39:14,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-12 15:39:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:39:14,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:14,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:14,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:39:14,566 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash -560640024, now seen corresponding path program 2 times [2020-10-12 15:39:14,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:14,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135770605] [2020-10-12 15:39:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:14,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:14,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:14,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:39:14,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:14,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-12 15:39:14,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:14,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:14,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:14,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:39:14,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:15,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:15,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:15,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:15,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:15,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:15,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:15,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:15,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135770605] [2020-10-12 15:39:15,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:15,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:15,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693773723] [2020-10-12 15:39:15,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:15,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:15,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:15,361 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 10 states. [2020-10-12 15:39:15,500 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2020-10-12 15:39:15,662 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-12 15:39:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:15,892 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-12 15:39:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:39:15,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-12 15:39:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:15,894 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:39:15,894 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:39:15,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:39:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-10-12 15:39:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:39:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-12 15:39:15,901 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 23 [2020-10-12 15:39:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:15,902 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-12 15:39:15,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-12 15:39:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:39:15,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:15,903 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] [2020-10-12 15:39:15,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:39:15,903 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:15,903 INFO L82 PathProgramCache]: Analyzing trace with hash -560638102, now seen corresponding path program 2 times [2020-10-12 15:39:15,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:15,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101529775] [2020-10-12 15:39:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:15,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:16,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:39:16,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:16,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-12 15:39:16,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:16,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:39:16,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:16,983 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-12 15:39:17,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:17,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:17,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:17,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:17,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:17,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:17,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:17,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:17,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101529775] [2020-10-12 15:39:17,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:17,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:17,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859133891] [2020-10-12 15:39:17,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:17,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:17,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:17,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:17,165 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 10 states. [2020-10-12 15:39:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:17,606 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-10-12 15:39:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:17,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-12 15:39:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:17,607 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:39:17,607 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 15:39:17,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 15:39:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2020-10-12 15:39:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:39:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-12 15:39:17,614 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 23 [2020-10-12 15:39:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:17,614 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-12 15:39:17,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-12 15:39:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:39:17,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:17,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:17,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:39:17,616 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash -558791060, now seen corresponding path program 1 times [2020-10-12 15:39:17,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:17,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685813293] [2020-10-12 15:39:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:17,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:17,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:18,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:39:18,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:39:18,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-10-12 15:39:18,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:18,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:18,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:18,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:39:18,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:19,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:19,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:19,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:19,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:19,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:19,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:19,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:19,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:19,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685813293] [2020-10-12 15:39:19,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:19,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:19,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857884394] [2020-10-12 15:39:19,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:19,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:19,202 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 10 states. [2020-10-12 15:39:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:19,485 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2020-10-12 15:39:19,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:39:19,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-12 15:39:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:19,486 INFO L225 Difference]: With dead ends: 73 [2020-10-12 15:39:19,487 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:39:19,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:39:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-10-12 15:39:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 15:39:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-12 15:39:19,493 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 23 [2020-10-12 15:39:19,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:19,494 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-12 15:39:19,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-12 15:39:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:39:19,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:19,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:19,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:39:19,495 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:19,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:19,495 INFO L82 PathProgramCache]: Analyzing trace with hash -324737095, now seen corresponding path program 2 times [2020-10-12 15:39:19,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:19,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739666300] [2020-10-12 15:39:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:19,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:20,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:20,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:20,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:39:20,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:39:20,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-12 15:39:20,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:20,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:20,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:20,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:39:20,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:20,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:20,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:20,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:20,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:20,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:20,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:20,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:20,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:20,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:20,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:20,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739666300] [2020-10-12 15:39:20,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:20,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:20,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440350799] [2020-10-12 15:39:20,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:20,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:20,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:20,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:20,986 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 11 states. [2020-10-12 15:39:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:21,535 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2020-10-12 15:39:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:39:21,536 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-12 15:39:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:21,537 INFO L225 Difference]: With dead ends: 78 [2020-10-12 15:39:21,537 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:39:21,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:39:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2020-10-12 15:39:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:39:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-10-12 15:39:21,544 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2020-10-12 15:39:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:21,545 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-10-12 15:39:21,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-10-12 15:39:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:39:21,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:21,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:21,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:39:21,548 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:21,549 INFO L82 PathProgramCache]: Analyzing trace with hash -322890053, now seen corresponding path program 2 times [2020-10-12 15:39:21,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:21,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492283377] [2020-10-12 15:39:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:21,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:21,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:22,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:22,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:39:22,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:22,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-12 15:39:22,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:39:22,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:22,286 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-12 15:39:22,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:22,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:22,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:22,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:22,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:22,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:22,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:22,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:22,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492283377] [2020-10-12 15:39:22,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:22,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:22,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178521714] [2020-10-12 15:39:22,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:22,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:22,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:22,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:22,589 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 11 states. [2020-10-12 15:39:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:23,180 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2020-10-12 15:39:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:39:23,181 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-12 15:39:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:23,182 INFO L225 Difference]: With dead ends: 98 [2020-10-12 15:39:23,182 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 15:39:23,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 15:39:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-12 15:39:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 15:39:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2020-10-12 15:39:23,190 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 25 [2020-10-12 15:39:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:23,190 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2020-10-12 15:39:23,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2020-10-12 15:39:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:39:23,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:23,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:23,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:39:23,192 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash -322888131, now seen corresponding path program 3 times [2020-10-12 15:39:23,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:23,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762108709] [2020-10-12 15:39:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:23,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:23,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:23,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:23,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:39:23,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-12 15:39:23,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:39:23,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:24,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:24,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:24,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:24,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:24,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:24,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:24,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:24,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:24,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:24,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:24,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762108709] [2020-10-12 15:39:24,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:24,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:24,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751936975] [2020-10-12 15:39:24,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:24,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:24,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:24,224 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand 11 states. [2020-10-12 15:39:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:24,778 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-10-12 15:39:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:39:24,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-12 15:39:24,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:24,780 INFO L225 Difference]: With dead ends: 116 [2020-10-12 15:39:24,780 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 15:39:24,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 15:39:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-10-12 15:39:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 15:39:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2020-10-12 15:39:24,788 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 25 [2020-10-12 15:39:24,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:24,789 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2020-10-12 15:39:24,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2020-10-12 15:39:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:39:24,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:24,790 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:24,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:39:24,790 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:24,790 INFO L82 PathProgramCache]: Analyzing trace with hash -717762183, now seen corresponding path program 4 times [2020-10-12 15:39:24,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:24,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178812344] [2020-10-12 15:39:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:24,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:25,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:25,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:25,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:25,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:25,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:25,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:25,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:25,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:25,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:25,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:25,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:25,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:25,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178812344] [2020-10-12 15:39:25,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:25,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:25,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917126365] [2020-10-12 15:39:25,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:25,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:25,581 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand 9 states. [2020-10-12 15:39:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:26,068 INFO L93 Difference]: Finished difference Result 143 states and 187 transitions. [2020-10-12 15:39:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:39:26,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-12 15:39:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:26,070 INFO L225 Difference]: With dead ends: 143 [2020-10-12 15:39:26,070 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 15:39:26,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 15:39:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 115. [2020-10-12 15:39:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 15:39:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2020-10-12 15:39:26,080 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 25 [2020-10-12 15:39:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:26,080 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2020-10-12 15:39:26,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2020-10-12 15:39:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:39:26,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:26,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:26,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:39:26,082 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash -715915141, now seen corresponding path program 5 times [2020-10-12 15:39:26,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:26,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967168807] [2020-10-12 15:39:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:26,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:27,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:27,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:39:27,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:39:27,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 907 [2020-10-12 15:39:27,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:39:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:27,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:27,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:27,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:27,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:27,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:27,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:27,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:27,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:27,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:27,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:27,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:27,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967168807] [2020-10-12 15:39:27,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:27,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:27,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041956477] [2020-10-12 15:39:27,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:27,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:27,349 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand 11 states. [2020-10-12 15:39:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:27,744 INFO L93 Difference]: Finished difference Result 173 states and 221 transitions. [2020-10-12 15:39:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:39:27,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-12 15:39:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:27,748 INFO L225 Difference]: With dead ends: 173 [2020-10-12 15:39:27,751 INFO L226 Difference]: Without dead ends: 151 [2020-10-12 15:39:27,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-12 15:39:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 127. [2020-10-12 15:39:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 15:39:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 161 transitions. [2020-10-12 15:39:27,768 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 161 transitions. Word has length 25 [2020-10-12 15:39:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:27,769 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 161 transitions. [2020-10-12 15:39:27,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 161 transitions. [2020-10-12 15:39:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:39:27,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:27,770 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:27,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:39:27,770 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1604600773, now seen corresponding path program 3 times [2020-10-12 15:39:27,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:27,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635396066] [2020-10-12 15:39:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:27,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:27,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:28,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:28,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:39:28,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-12 15:39:28,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:39:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:28,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:28,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:28,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:28,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:28,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:28,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:28,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:28,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635396066] [2020-10-12 15:39:28,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:28,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:28,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764619185] [2020-10-12 15:39:28,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:28,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:28,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:28,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:28,554 INFO L87 Difference]: Start difference. First operand 127 states and 161 transitions. Second operand 11 states. [2020-10-12 15:39:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:29,189 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2020-10-12 15:39:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:39:29,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-12 15:39:29,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:29,192 INFO L225 Difference]: With dead ends: 145 [2020-10-12 15:39:29,193 INFO L226 Difference]: Without dead ends: 143 [2020-10-12 15:39:29,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:29,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-12 15:39:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2020-10-12 15:39:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 15:39:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 170 transitions. [2020-10-12 15:39:29,202 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 170 transitions. Word has length 25 [2020-10-12 15:39:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:29,203 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 170 transitions. [2020-10-12 15:39:29,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 170 transitions. [2020-10-12 15:39:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:39:29,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:29,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:29,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:39:29,204 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:29,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1604598851, now seen corresponding path program 6 times [2020-10-12 15:39:29,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:29,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60406990] [2020-10-12 15:39:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:29,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:29,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:29,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:29,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:39:29,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:29,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-12 15:39:29,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:29,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:29,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:29,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:39:29,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:30,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:30,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:30,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:30,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:30,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:30,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:30,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:30,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60406990] [2020-10-12 15:39:30,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:30,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:30,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609272942] [2020-10-12 15:39:30,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:30,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:30,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:30,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:30,041 INFO L87 Difference]: Start difference. First operand 133 states and 170 transitions. Second operand 11 states. [2020-10-12 15:39:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:30,713 INFO L93 Difference]: Finished difference Result 186 states and 240 transitions. [2020-10-12 15:39:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:39:30,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-12 15:39:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:30,715 INFO L225 Difference]: With dead ends: 186 [2020-10-12 15:39:30,715 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 15:39:30,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 15:39:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 140. [2020-10-12 15:39:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-12 15:39:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2020-10-12 15:39:30,725 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 25 [2020-10-12 15:39:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:30,725 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2020-10-12 15:39:30,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2020-10-12 15:39:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:39:30,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:30,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:30,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:39:30,726 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1997625861, now seen corresponding path program 7 times [2020-10-12 15:39:30,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:30,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989480449] [2020-10-12 15:39:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:30,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:30,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:30,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:31,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:39:31,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:39:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-12 15:39:31,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:39:31,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:31,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:31,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:31,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:31,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:31,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:31,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:31,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:31,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989480449] [2020-10-12 15:39:31,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:31,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:31,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522913139] [2020-10-12 15:39:31,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:31,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:31,536 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand 10 states. [2020-10-12 15:39:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:31,978 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2020-10-12 15:39:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:39:31,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-12 15:39:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:31,985 INFO L225 Difference]: With dead ends: 199 [2020-10-12 15:39:31,985 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 15:39:31,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 15:39:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 147. [2020-10-12 15:39:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 15:39:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 186 transitions. [2020-10-12 15:39:31,998 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 186 transitions. Word has length 25 [2020-10-12 15:39:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:31,998 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 186 transitions. [2020-10-12 15:39:31,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 186 transitions. [2020-10-12 15:39:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:31,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:31,999 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:31,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:39:31,999 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:32,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1446394771, now seen corresponding path program 2 times [2020-10-12 15:39:32,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:32,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586497411] [2020-10-12 15:39:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:32,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:32,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:32,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:33,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:34,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:34,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:34,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:39:34,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2238 [2020-10-12 15:39:34,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:34,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:34,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:34,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:34,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:34,474 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-12 15:39:34,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:34,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:34,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:34,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:34,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:34,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:34,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:34,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:34,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586497411] [2020-10-12 15:39:34,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:34,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:34,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457977960] [2020-10-12 15:39:34,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:34,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:34,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:34,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:34,960 INFO L87 Difference]: Start difference. First operand 147 states and 186 transitions. Second operand 14 states. [2020-10-12 15:39:35,099 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-12 15:39:35,381 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 15:39:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:35,827 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2020-10-12 15:39:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:35,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-12 15:39:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:35,828 INFO L225 Difference]: With dead ends: 161 [2020-10-12 15:39:35,829 INFO L226 Difference]: Without dead ends: 159 [2020-10-12 15:39:35,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:39:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-12 15:39:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2020-10-12 15:39:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 15:39:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 192 transitions. [2020-10-12 15:39:35,842 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 192 transitions. Word has length 28 [2020-10-12 15:39:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:35,842 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 192 transitions. [2020-10-12 15:39:35,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 192 transitions. [2020-10-12 15:39:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:35,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:35,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:35,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:39:35,843 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1448241813, now seen corresponding path program 3 times [2020-10-12 15:39:35,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:35,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501690128] [2020-10-12 15:39:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:35,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:36,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:36,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:36,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:36,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-12 15:39:36,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:36,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:36,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:36,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:36,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:36,897 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-12 15:39:37,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:37,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:37,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:37,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:37,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:37,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:37,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:37,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:37,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501690128] [2020-10-12 15:39:37,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:37,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:37,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371006860] [2020-10-12 15:39:37,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:37,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:37,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:37,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:37,344 INFO L87 Difference]: Start difference. First operand 152 states and 192 transitions. Second operand 12 states. [2020-10-12 15:39:37,553 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 71 [2020-10-12 15:39:37,810 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-12 15:39:38,114 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 15:39:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:38,628 INFO L93 Difference]: Finished difference Result 188 states and 234 transitions. [2020-10-12 15:39:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:39:38,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:39:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:38,629 INFO L225 Difference]: With dead ends: 188 [2020-10-12 15:39:38,629 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 15:39:38,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:39:38,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 15:39:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 154. [2020-10-12 15:39:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 15:39:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 194 transitions. [2020-10-12 15:39:38,640 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 194 transitions. Word has length 28 [2020-10-12 15:39:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:38,640 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 194 transitions. [2020-10-12 15:39:38,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 194 transitions. [2020-10-12 15:39:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:38,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:38,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:38,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:39:38,642 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1448243735, now seen corresponding path program 3 times [2020-10-12 15:39:38,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:38,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127817834] [2020-10-12 15:39:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:38,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:38,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:39,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:39,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:39,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:39,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:39,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-12 15:39:39,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:39:39,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:39,852 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-12 15:39:40,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:40,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:40,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:40,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:40,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:40,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:40,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:40,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:40,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:40,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:40,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127817834] [2020-10-12 15:39:40,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:40,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:40,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395912891] [2020-10-12 15:39:40,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:40,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:40,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:40,250 INFO L87 Difference]: Start difference. First operand 154 states and 194 transitions. Second operand 12 states. [2020-10-12 15:39:40,457 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2020-10-12 15:39:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:40,915 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2020-10-12 15:39:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:39:40,915 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:39:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:40,917 INFO L225 Difference]: With dead ends: 175 [2020-10-12 15:39:40,917 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 15:39:40,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:39:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 15:39:40,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2020-10-12 15:39:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 15:39:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 194 transitions. [2020-10-12 15:39:40,931 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 194 transitions. Word has length 28 [2020-10-12 15:39:40,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:40,931 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 194 transitions. [2020-10-12 15:39:40,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 194 transitions. [2020-10-12 15:39:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:40,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:40,932 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:40,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:39:40,932 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:40,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1053367761, now seen corresponding path program 4 times [2020-10-12 15:39:40,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:40,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690941198] [2020-10-12 15:39:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:40,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:41,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:41,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:41,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:41,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 606 [2020-10-12 15:39:41,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:41,963 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-12 15:39:42,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:42,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:42,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:42,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:42,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:42,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:42,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:42,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:42,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:42,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:42,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:42,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690941198] [2020-10-12 15:39:42,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:42,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:42,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025387693] [2020-10-12 15:39:42,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:42,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:42,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:42,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:42,270 INFO L87 Difference]: Start difference. First operand 154 states and 194 transitions. Second operand 12 states. [2020-10-12 15:39:42,487 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 66 [2020-10-12 15:39:42,752 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2020-10-12 15:39:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:43,618 INFO L93 Difference]: Finished difference Result 182 states and 228 transitions. [2020-10-12 15:39:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:39:43,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:39:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:43,622 INFO L225 Difference]: With dead ends: 182 [2020-10-12 15:39:43,622 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 15:39:43,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:39:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 15:39:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 154. [2020-10-12 15:39:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 15:39:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 194 transitions. [2020-10-12 15:39:43,633 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 194 transitions. Word has length 28 [2020-10-12 15:39:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:43,633 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 194 transitions. [2020-10-12 15:39:43,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 194 transitions. [2020-10-12 15:39:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:43,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:43,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:43,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:39:43,635 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:43,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1053369683, now seen corresponding path program 4 times [2020-10-12 15:39:43,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:43,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081300267] [2020-10-12 15:39:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:43,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:44,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:44,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:44,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:44,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:44,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-12 15:39:44,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:44,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:44,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:44,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:44,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:44,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:44,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:44,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:44,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081300267] [2020-10-12 15:39:44,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:44,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:44,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231138109] [2020-10-12 15:39:44,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:44,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:44,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:44,851 INFO L87 Difference]: Start difference. First operand 154 states and 194 transitions. Second operand 12 states. [2020-10-12 15:39:45,067 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 67 [2020-10-12 15:39:45,366 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-12 15:39:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:45,979 INFO L93 Difference]: Finished difference Result 183 states and 231 transitions. [2020-10-12 15:39:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:39:45,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:39:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:45,981 INFO L225 Difference]: With dead ends: 183 [2020-10-12 15:39:45,981 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 15:39:45,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:39:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 15:39:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2020-10-12 15:39:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 15:39:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 200 transitions. [2020-10-12 15:39:45,992 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 200 transitions. Word has length 28 [2020-10-12 15:39:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:45,993 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 200 transitions. [2020-10-12 15:39:45,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 200 transitions. [2020-10-12 15:39:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:45,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:45,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:45,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:39:45,994 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1055216725, now seen corresponding path program 5 times [2020-10-12 15:39:45,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:45,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329358098] [2020-10-12 15:39:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:46,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:46,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:46,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:47,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:47,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:47,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:47,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:39:47,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1365 [2020-10-12 15:39:47,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:47,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:47,566 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-12 15:39:47,684 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-12 15:39:47,816 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-12 15:39:48,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:48,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:48,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:48,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:48,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:48,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:48,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:48,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:48,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:48,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:48,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:48,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329358098] [2020-10-12 15:39:48,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:48,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:48,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232280644] [2020-10-12 15:39:48,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:48,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:48,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:48,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:48,106 INFO L87 Difference]: Start difference. First operand 159 states and 200 transitions. Second operand 12 states. [2020-10-12 15:39:48,364 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 80 [2020-10-12 15:39:48,713 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-12 15:39:48,856 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-10-12 15:39:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:49,335 INFO L93 Difference]: Finished difference Result 197 states and 249 transitions. [2020-10-12 15:39:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:39:49,336 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:39:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:49,337 INFO L225 Difference]: With dead ends: 197 [2020-10-12 15:39:49,337 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 15:39:49,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:39:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 15:39:49,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 159. [2020-10-12 15:39:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 15:39:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 200 transitions. [2020-10-12 15:39:49,349 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 200 transitions. Word has length 28 [2020-10-12 15:39:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:49,349 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 200 transitions. [2020-10-12 15:39:49,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 200 transitions. [2020-10-12 15:39:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:49,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:49,350 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:49,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:39:49,350 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:49,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:49,351 INFO L82 PathProgramCache]: Analyzing trace with hash 166531093, now seen corresponding path program 5 times [2020-10-12 15:39:49,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:49,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345027309] [2020-10-12 15:39:49,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:49,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:49,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:50,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:50,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:50,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:50,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-12 15:39:50,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:50,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:50,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:50,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:50,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:50,183 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-12 15:39:50,411 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-12 15:39:50,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:50,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:50,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:50,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:50,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:50,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:50,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:50,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:50,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345027309] [2020-10-12 15:39:50,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:50,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:50,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211037073] [2020-10-12 15:39:50,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:50,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:50,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:50,704 INFO L87 Difference]: Start difference. First operand 159 states and 200 transitions. Second operand 12 states. [2020-10-12 15:39:50,964 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 78 [2020-10-12 15:39:51,269 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2020-10-12 15:39:51,428 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-12 15:39:51,632 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-12 15:39:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:52,159 INFO L93 Difference]: Finished difference Result 200 states and 249 transitions. [2020-10-12 15:39:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:39:52,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:39:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:52,162 INFO L225 Difference]: With dead ends: 200 [2020-10-12 15:39:52,162 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 15:39:52,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:39:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 15:39:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 151. [2020-10-12 15:39:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 15:39:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2020-10-12 15:39:52,178 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 28 [2020-10-12 15:39:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:52,178 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2020-10-12 15:39:52,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2020-10-12 15:39:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:52,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:52,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:52,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:39:52,180 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash 166533015, now seen corresponding path program 6 times [2020-10-12 15:39:52,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:52,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072880736] [2020-10-12 15:39:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:52,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:52,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:53,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:53,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:53,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-12 15:39:53,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:53,596 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-10-12 15:39:53,817 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-12 15:39:54,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:54,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:54,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:54,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:54,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:54,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:54,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:54,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:54,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:54,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072880736] [2020-10-12 15:39:54,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:54,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:54,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605740966] [2020-10-12 15:39:54,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:54,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:54,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:54,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:54,014 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand 12 states. [2020-10-12 15:39:54,258 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 74 [2020-10-12 15:39:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:54,808 INFO L93 Difference]: Finished difference Result 181 states and 227 transitions. [2020-10-12 15:39:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:54,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:39:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:54,810 INFO L225 Difference]: With dead ends: 181 [2020-10-12 15:39:54,810 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 15:39:54,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 15:39:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 156. [2020-10-12 15:39:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 15:39:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 195 transitions. [2020-10-12 15:39:54,822 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 195 transitions. Word has length 28 [2020-10-12 15:39:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:54,823 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 195 transitions. [2020-10-12 15:39:54,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 195 transitions. [2020-10-12 15:39:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:54,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:54,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:54,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:39:54,824 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:54,825 INFO L82 PathProgramCache]: Analyzing trace with hash 168380057, now seen corresponding path program 7 times [2020-10-12 15:39:54,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:54,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421785019] [2020-10-12 15:39:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:54,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:54,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:55,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:55,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:55,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:55,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:55,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 876 [2020-10-12 15:39:55,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:55,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:55,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:55,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:55,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:55,924 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-12 15:39:56,144 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-12 15:39:56,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:56,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:56,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:56,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:56,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:56,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:56,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:56,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:56,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421785019] [2020-10-12 15:39:56,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:56,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:56,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037624803] [2020-10-12 15:39:56,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:56,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:56,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:56,389 INFO L87 Difference]: Start difference. First operand 156 states and 195 transitions. Second operand 12 states. [2020-10-12 15:39:56,631 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 73 [2020-10-12 15:39:56,935 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-12 15:39:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:57,866 INFO L93 Difference]: Finished difference Result 189 states and 237 transitions. [2020-10-12 15:39:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:39:57,866 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:39:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:57,867 INFO L225 Difference]: With dead ends: 189 [2020-10-12 15:39:57,867 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 15:39:57,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:39:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 15:39:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 151. [2020-10-12 15:39:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 15:39:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2020-10-12 15:39:57,880 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 28 [2020-10-12 15:39:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:57,880 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2020-10-12 15:39:57,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2020-10-12 15:39:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:57,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:57,881 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:57,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:39:57,882 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:57,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:57,882 INFO L82 PathProgramCache]: Analyzing trace with hash -226493995, now seen corresponding path program 8 times [2020-10-12 15:39:57,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:57,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210465987] [2020-10-12 15:39:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:57,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:58,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:58,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:58,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:58,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:58,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:39:58,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-12 15:39:58,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:58,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:58,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:58,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:58,926 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-12 15:39:59,137 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-12 15:39:59,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:59,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:59,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:59,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:59,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:59,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:59,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:59,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:59,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210465987] [2020-10-12 15:39:59,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:59,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:59,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858660953] [2020-10-12 15:39:59,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:59,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:59,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:59,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:59,439 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand 12 states. [2020-10-12 15:39:59,670 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2020-10-12 15:39:59,999 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2020-10-12 15:40:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:00,869 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2020-10-12 15:40:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:40:00,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 15:40:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:00,871 INFO L225 Difference]: With dead ends: 188 [2020-10-12 15:40:00,871 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 15:40:00,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:40:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 15:40:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 156. [2020-10-12 15:40:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 15:40:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 195 transitions. [2020-10-12 15:40:00,884 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 195 transitions. Word has length 28 [2020-10-12 15:40:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:00,884 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 195 transitions. [2020-10-12 15:40:00,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:40:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 195 transitions. [2020-10-12 15:40:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:40:00,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:00,885 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:00,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:40:00,885 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash -224646953, now seen corresponding path program 2 times [2020-10-12 15:40:00,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:00,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630347919] [2020-10-12 15:40:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:01,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:01,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:01,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:01,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:03,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:03,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:03,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:40:03,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:40:03,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2579 [2020-10-12 15:40:03,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:40:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:40:03,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:03,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:03,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:03,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:03,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:03,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:03,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:03,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:03,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:03,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:03,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:03,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 15:40:03,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630347919] [2020-10-12 15:40:03,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:03,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:40:03,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925521392] [2020-10-12 15:40:03,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:40:03,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:40:03,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:40:03,722 INFO L87 Difference]: Start difference. First operand 156 states and 195 transitions. Second operand 8 states. [2020-10-12 15:40:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:03,916 INFO L93 Difference]: Finished difference Result 171 states and 216 transitions. [2020-10-12 15:40:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:40:03,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-12 15:40:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:03,918 INFO L225 Difference]: With dead ends: 171 [2020-10-12 15:40:03,918 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 15:40:03,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:40:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 15:40:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-10-12 15:40:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 15:40:03,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 201 transitions. [2020-10-12 15:40:03,931 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 201 transitions. Word has length 28 [2020-10-12 15:40:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:03,931 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 201 transitions. [2020-10-12 15:40:03,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:40:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 201 transitions. [2020-10-12 15:40:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:40:03,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:03,932 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:03,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:40:03,932 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2108207844, now seen corresponding path program 3 times [2020-10-12 15:40:03,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:03,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650244545] [2020-10-12 15:40:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:03,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:05,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:05,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:05,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:40:05,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:40:05,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1561 [2020-10-12 15:40:05,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:05,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:40:05,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:05,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:40:05,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:05,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:05,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:05,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:05,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:05,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:05,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:05,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:05,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 15:40:05,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650244545] [2020-10-12 15:40:05,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:05,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:40:05,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029598014] [2020-10-12 15:40:05,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:40:05,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:40:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:40:05,802 INFO L87 Difference]: Start difference. First operand 161 states and 201 transitions. Second operand 10 states. [2020-10-12 15:40:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:06,218 INFO L93 Difference]: Finished difference Result 171 states and 212 transitions. [2020-10-12 15:40:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:40:06,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-12 15:40:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:06,219 INFO L225 Difference]: With dead ends: 171 [2020-10-12 15:40:06,220 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 15:40:06,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 15:40:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-10-12 15:40:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 15:40:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2020-10-12 15:40:06,235 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 30 [2020-10-12 15:40:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:06,235 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2020-10-12 15:40:06,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:40:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2020-10-12 15:40:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:40:06,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:06,236 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:06,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:40:06,237 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2110054886, now seen corresponding path program 4 times [2020-10-12 15:40:06,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:06,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242334266] [2020-10-12 15:40:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:06,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:06,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:06,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:06,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:40:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:40:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-12 15:40:06,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:40:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:40:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:07,082 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-12 15:40:07,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:07,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:07,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:07,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:07,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:07,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:07,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:07,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:07,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:07,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:40:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:07,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242334266] [2020-10-12 15:40:07,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:07,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:40:07,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387523121] [2020-10-12 15:40:07,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:40:07,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:40:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:40:07,641 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand 12 states. [2020-10-12 15:40:07,810 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-12 15:40:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:08,427 INFO L93 Difference]: Finished difference Result 245 states and 314 transitions. [2020-10-12 15:40:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:40:08,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:40:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:08,438 INFO L225 Difference]: With dead ends: 245 [2020-10-12 15:40:08,438 INFO L226 Difference]: Without dead ends: 243 [2020-10-12 15:40:08,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-12 15:40:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-12 15:40:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 15:40:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 210 transitions. [2020-10-12 15:40:08,453 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 210 transitions. Word has length 30 [2020-10-12 15:40:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:08,453 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 210 transitions. [2020-10-12 15:40:08,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:40:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 210 transitions. [2020-10-12 15:40:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:40:08,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:08,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:08,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:40:08,454 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:08,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash 437166120, now seen corresponding path program 8 times [2020-10-12 15:40:08,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:08,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397879877] [2020-10-12 15:40:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:08,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:08,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:09,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:09,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:10,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:10,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:10,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:10,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:40:10,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:40:10,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1949 [2020-10-12 15:40:10,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:10,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:40:10,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:10,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:40:10,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:10,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:10,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:10,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:10,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:10,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:10,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:10,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:10,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:10,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:10,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:10,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:10,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397879877] [2020-10-12 15:40:10,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:10,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:40:10,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133434428] [2020-10-12 15:40:10,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:40:10,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:10,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:40:10,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:40:10,809 INFO L87 Difference]: Start difference. First operand 166 states and 210 transitions. Second operand 12 states. [2020-10-12 15:40:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:11,472 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2020-10-12 15:40:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:40:11,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:40:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:11,474 INFO L225 Difference]: With dead ends: 219 [2020-10-12 15:40:11,475 INFO L226 Difference]: Without dead ends: 191 [2020-10-12 15:40:11,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:40:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-12 15:40:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2020-10-12 15:40:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 15:40:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2020-10-12 15:40:11,488 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 30 [2020-10-12 15:40:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:11,488 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2020-10-12 15:40:11,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:40:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2020-10-12 15:40:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:40:11,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:11,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:11,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:40:11,489 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1290559394, now seen corresponding path program 5 times [2020-10-12 15:40:11,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:11,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784016577] [2020-10-12 15:40:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:11,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:11,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:12,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:12,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:12,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:40:12,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:40:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-12 15:40:12,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:40:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:12,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:40:12,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:12,541 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-12 15:40:12,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:12,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:12,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:12,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:12,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:12,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:12,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:12,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:40:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:12,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784016577] [2020-10-12 15:40:12,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:12,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:40:12,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040204018] [2020-10-12 15:40:12,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:40:12,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:12,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:40:12,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:40:12,892 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand 13 states. [2020-10-12 15:40:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:13,903 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2020-10-12 15:40:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:40:13,904 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-12 15:40:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:13,905 INFO L225 Difference]: With dead ends: 213 [2020-10-12 15:40:13,906 INFO L226 Difference]: Without dead ends: 211 [2020-10-12 15:40:13,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:40:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-12 15:40:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-10-12 15:40:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-12 15:40:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 251 transitions. [2020-10-12 15:40:13,922 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 251 transitions. Word has length 30 [2020-10-12 15:40:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:13,922 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 251 transitions. [2020-10-12 15:40:13,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:40:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 251 transitions. [2020-10-12 15:40:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:40:13,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:13,923 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:13,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:40:13,924 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash 899381348, now seen corresponding path program 9 times [2020-10-12 15:40:13,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:13,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467167616] [2020-10-12 15:40:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:13,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:14,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:14,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:14,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:14,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:15,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:40:15,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:40:15,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1966 [2020-10-12 15:40:15,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:40:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:40:15,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:16,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:16,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:16,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:16,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:16,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:16,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:16,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:16,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:40:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:16,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467167616] [2020-10-12 15:40:16,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:16,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:40:16,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660644369] [2020-10-12 15:40:16,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:40:16,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:16,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:40:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:40:16,437 INFO L87 Difference]: Start difference. First operand 201 states and 251 transitions. Second operand 11 states. [2020-10-12 15:40:17,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:17,121 INFO L93 Difference]: Finished difference Result 246 states and 313 transitions. [2020-10-12 15:40:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:40:17,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 15:40:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:17,125 INFO L225 Difference]: With dead ends: 246 [2020-10-12 15:40:17,125 INFO L226 Difference]: Without dead ends: 218 [2020-10-12 15:40:17,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:40:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-12 15:40:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 201. [2020-10-12 15:40:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-12 15:40:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 251 transitions. [2020-10-12 15:40:17,144 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 251 transitions. Word has length 30 [2020-10-12 15:40:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:17,145 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 251 transitions. [2020-10-12 15:40:17,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:40:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 251 transitions. [2020-10-12 15:40:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:40:17,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:17,146 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:17,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:40:17,146 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:17,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:17,146 INFO L82 PathProgramCache]: Analyzing trace with hash 10697638, now seen corresponding path program 10 times [2020-10-12 15:40:17,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:17,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328928231] [2020-10-12 15:40:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:17,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:17,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:17,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:18,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:18,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:18,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:40:18,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:40:18,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1404 [2020-10-12 15:40:18,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:18,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:40:18,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:18,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:40:18,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:19,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:19,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:19,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:19,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:19,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:19,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:40:19,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:19,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:19,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:19,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:19,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:19,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328928231] [2020-10-12 15:40:19,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:19,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:40:19,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488569005] [2020-10-12 15:40:19,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:40:19,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:19,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:40:19,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:40:19,149 INFO L87 Difference]: Start difference. First operand 201 states and 251 transitions. Second operand 12 states. [2020-10-12 15:40:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:19,615 INFO L93 Difference]: Finished difference Result 279 states and 357 transitions. [2020-10-12 15:40:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:40:19,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:40:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:19,617 INFO L225 Difference]: With dead ends: 279 [2020-10-12 15:40:19,617 INFO L226 Difference]: Without dead ends: 251 [2020-10-12 15:40:19,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-12 15:40:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 227. [2020-10-12 15:40:19,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-12 15:40:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 284 transitions. [2020-10-12 15:40:19,636 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 284 transitions. Word has length 30 [2020-10-12 15:40:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:19,636 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 284 transitions. [2020-10-12 15:40:19,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:40:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 284 transitions. [2020-10-12 15:40:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:40:19,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:19,638 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:19,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:40:19,638 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:19,638 INFO L82 PathProgramCache]: Analyzing trace with hash -382329372, now seen corresponding path program 11 times [2020-10-12 15:40:19,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:19,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830184755] [2020-10-12 15:40:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:19,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:20,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:20,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:21,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:21,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:40:21,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:40:21,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1352 [2020-10-12 15:40:21,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:21,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:40:21,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:21,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:40:21,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:21,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:21,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:21,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:21,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:21,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:21,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:21,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:21,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:21,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:21,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:21,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:21,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830184755] [2020-10-12 15:40:21,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:21,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:40:21,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720251430] [2020-10-12 15:40:21,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:40:21,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:40:21,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:40:21,419 INFO L87 Difference]: Start difference. First operand 227 states and 284 transitions. Second operand 12 states. [2020-10-12 15:40:22,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:22,038 INFO L93 Difference]: Finished difference Result 328 states and 415 transitions. [2020-10-12 15:40:22,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:40:22,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:40:22,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:22,041 INFO L225 Difference]: With dead ends: 328 [2020-10-12 15:40:22,041 INFO L226 Difference]: Without dead ends: 300 [2020-10-12 15:40:22,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:40:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-12 15:40:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 246. [2020-10-12 15:40:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-12 15:40:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 307 transitions. [2020-10-12 15:40:22,061 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 307 transitions. Word has length 30 [2020-10-12 15:40:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:22,061 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 307 transitions. [2020-10-12 15:40:22,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:40:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 307 transitions. [2020-10-12 15:40:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:40:22,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:22,062 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:22,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:40:22,063 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2096346954, now seen corresponding path program 3 times [2020-10-12 15:40:22,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:22,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392734911] [2020-10-12 15:40:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:22,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:22,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:22,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:22,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:23,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:24,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:25,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:26,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:40:26,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:40:26,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4176 [2020-10-12 15:40:26,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:26,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:40:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:40:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:26,483 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-12 15:40:26,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:26,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:26,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:26,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:26,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:26,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:26,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:40:26,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392734911] [2020-10-12 15:40:26,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:26,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:26,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509022779] [2020-10-12 15:40:26,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:26,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:26,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:26,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:26,951 INFO L87 Difference]: Start difference. First operand 246 states and 307 transitions. Second operand 15 states. [2020-10-12 15:40:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:27,611 INFO L93 Difference]: Finished difference Result 248 states and 308 transitions. [2020-10-12 15:40:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:40:27,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-12 15:40:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:27,614 INFO L225 Difference]: With dead ends: 248 [2020-10-12 15:40:27,614 INFO L226 Difference]: Without dead ends: 246 [2020-10-12 15:40:27,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:40:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-12 15:40:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-12 15:40:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 15:40:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 303 transitions. [2020-10-12 15:40:27,633 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 303 transitions. Word has length 33 [2020-10-12 15:40:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:27,634 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 303 transitions. [2020-10-12 15:40:27,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 303 transitions. [2020-10-12 15:40:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:40:27,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:27,635 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:27,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 15:40:27,635 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2098193996, now seen corresponding path program 6 times [2020-10-12 15:40:27,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:27,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964924077] [2020-10-12 15:40:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:27,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:27,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:29,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:29,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:40:29,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:40:29,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-12 15:40:29,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:40:29,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:29,477 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-12 15:40:29,592 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-12 15:40:29,747 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-12 15:40:29,905 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-12 15:40:30,077 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-12 15:40:30,224 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-12 15:40:30,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:30,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:30,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:30,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:30,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:30,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:30,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:30,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:30,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:30,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964924077] [2020-10-12 15:40:30,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:30,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:30,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658043719] [2020-10-12 15:40:30,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:30,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:30,565 INFO L87 Difference]: Start difference. First operand 243 states and 303 transitions. Second operand 14 states. [2020-10-12 15:40:30,835 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 67 [2020-10-12 15:40:31,127 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-12 15:40:31,311 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-12 15:40:31,577 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-12 15:40:31,883 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-12 15:40:32,235 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-12 15:40:32,453 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 15:40:32,619 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-12 15:40:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:33,218 INFO L93 Difference]: Finished difference Result 299 states and 368 transitions. [2020-10-12 15:40:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:40:33,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:40:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:33,221 INFO L225 Difference]: With dead ends: 299 [2020-10-12 15:40:33,221 INFO L226 Difference]: Without dead ends: 297 [2020-10-12 15:40:33,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:40:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-12 15:40:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 267. [2020-10-12 15:40:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-12 15:40:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 334 transitions. [2020-10-12 15:40:33,243 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 334 transitions. Word has length 33 [2020-10-12 15:40:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:33,243 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 334 transitions. [2020-10-12 15:40:33,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 334 transitions. [2020-10-12 15:40:33,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:40:33,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:33,244 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:33,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 15:40:33,244 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:33,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2098195918, now seen corresponding path program 9 times [2020-10-12 15:40:33,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:33,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778199282] [2020-10-12 15:40:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:33,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:33,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:33,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:35,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:35,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:40:35,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:40:35,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2420 [2020-10-12 15:40:35,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:35,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:35,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:35,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:40:35,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:35,896 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-10-12 15:40:36,165 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-12 15:40:36,337 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-12 15:40:36,512 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-12 15:40:36,714 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-12 15:40:36,893 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-12 15:40:37,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:37,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:37,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:37,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:37,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:37,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:37,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:37,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778199282] [2020-10-12 15:40:37,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:37,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:37,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472267557] [2020-10-12 15:40:37,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:37,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:37,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:37,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:37,131 INFO L87 Difference]: Start difference. First operand 267 states and 334 transitions. Second operand 14 states. [2020-10-12 15:40:37,365 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-12 15:40:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:38,220 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2020-10-12 15:40:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:40:38,220 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:40:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:38,222 INFO L225 Difference]: With dead ends: 284 [2020-10-12 15:40:38,222 INFO L226 Difference]: Without dead ends: 277 [2020-10-12 15:40:38,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:40:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-12 15:40:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 267. [2020-10-12 15:40:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-12 15:40:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 334 transitions. [2020-10-12 15:40:38,243 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 334 transitions. Word has length 33 [2020-10-12 15:40:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:38,244 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 334 transitions. [2020-10-12 15:40:38,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:38,244 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 334 transitions. [2020-10-12 15:40:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:40:38,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:38,245 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:38,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 15:40:38,245 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:38,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1703319944, now seen corresponding path program 7 times [2020-10-12 15:40:38,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:38,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396563911] [2020-10-12 15:40:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:38,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:38,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:39,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:40:39,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:40:39,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-12 15:40:39,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:40:39,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:39,951 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-12 15:40:40,136 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-10-12 15:40:40,295 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-12 15:40:40,431 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-12 15:40:40,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:40,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:40,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:40,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:40,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:40,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:40,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:40,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:40,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:40,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:40,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:40,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396563911] [2020-10-12 15:40:40,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:40,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:40,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413404950] [2020-10-12 15:40:40,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:40,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:40,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:40,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:40,748 INFO L87 Difference]: Start difference. First operand 267 states and 334 transitions. Second operand 14 states. [2020-10-12 15:40:40,995 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-12 15:40:41,363 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-12 15:40:41,784 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-12 15:40:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:42,257 INFO L93 Difference]: Finished difference Result 303 states and 377 transitions. [2020-10-12 15:40:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:40:42,258 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:40:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:42,259 INFO L225 Difference]: With dead ends: 303 [2020-10-12 15:40:42,259 INFO L226 Difference]: Without dead ends: 301 [2020-10-12 15:40:42,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:40:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-12 15:40:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2020-10-12 15:40:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-12 15:40:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 340 transitions. [2020-10-12 15:40:42,281 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 340 transitions. Word has length 33 [2020-10-12 15:40:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:42,282 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 340 transitions. [2020-10-12 15:40:42,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 340 transitions. [2020-10-12 15:40:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:40:42,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:42,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:42,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 15:40:42,284 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:42,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1703321866, now seen corresponding path program 10 times [2020-10-12 15:40:42,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:42,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632874880] [2020-10-12 15:40:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:42,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:42,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:44,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:44,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:45,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:45,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:40:45,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:40:45,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2876 [2020-10-12 15:40:45,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:45,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:45,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:45,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:40:45,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:45,412 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-12 15:40:45,526 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-12 15:40:45,648 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-12 15:40:45,917 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 14 [2020-10-12 15:40:46,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:46,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:46,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:46,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:46,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:46,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:46,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:46,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:46,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:46,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:46,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:46,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632874880] [2020-10-12 15:40:46,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:46,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:46,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161647436] [2020-10-12 15:40:46,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:46,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:46,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:46,152 INFO L87 Difference]: Start difference. First operand 272 states and 340 transitions. Second operand 14 states. [2020-10-12 15:40:46,436 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-12 15:40:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:47,338 INFO L93 Difference]: Finished difference Result 310 states and 388 transitions. [2020-10-12 15:40:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:40:47,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:40:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:47,341 INFO L225 Difference]: With dead ends: 310 [2020-10-12 15:40:47,341 INFO L226 Difference]: Without dead ends: 303 [2020-10-12 15:40:47,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:40:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-12 15:40:47,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 280. [2020-10-12 15:40:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-12 15:40:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 350 transitions. [2020-10-12 15:40:47,366 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 350 transitions. Word has length 33 [2020-10-12 15:40:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:47,366 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 350 transitions. [2020-10-12 15:40:47,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 350 transitions. [2020-10-12 15:40:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:40:47,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:47,367 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:47,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 15:40:47,368 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:47,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1705168908, now seen corresponding path program 11 times [2020-10-12 15:40:47,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:47,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338250674] [2020-10-12 15:40:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:47,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:48,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:48,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:40:48,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:40:48,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-12 15:40:48,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:48,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:48,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:48,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:40:48,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:48,661 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-12 15:40:49,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:49,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:49,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:49,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:49,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:49,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:49,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338250674] [2020-10-12 15:40:49,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:49,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:49,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483277348] [2020-10-12 15:40:49,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:49,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:49,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:49,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:49,430 INFO L87 Difference]: Start difference. First operand 280 states and 350 transitions. Second operand 14 states. [2020-10-12 15:40:49,670 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-12 15:40:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:50,514 INFO L93 Difference]: Finished difference Result 309 states and 386 transitions. [2020-10-12 15:40:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:50,514 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:40:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:50,516 INFO L225 Difference]: With dead ends: 309 [2020-10-12 15:40:50,516 INFO L226 Difference]: Without dead ends: 302 [2020-10-12 15:40:50,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:40:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-12 15:40:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2020-10-12 15:40:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-12 15:40:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 350 transitions. [2020-10-12 15:40:50,535 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 350 transitions. Word has length 33 [2020-10-12 15:40:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:50,535 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 350 transitions. [2020-10-12 15:40:50,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 350 transitions. [2020-10-12 15:40:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:40:50,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:50,537 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:50,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 15:40:50,537 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:50,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:50,538 INFO L82 PathProgramCache]: Analyzing trace with hash 816483276, now seen corresponding path program 8 times [2020-10-12 15:40:50,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:50,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844689814] [2020-10-12 15:40:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:50,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:51,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:51,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:40:51,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:51,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-12 15:40:51,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:40:51,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:51,609 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-12 15:40:51,825 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-12 15:40:52,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:52,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:52,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:52,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:52,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:52,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:52,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:52,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844689814] [2020-10-12 15:40:52,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:52,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:52,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505817180] [2020-10-12 15:40:52,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:52,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:52,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:52,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:52,461 INFO L87 Difference]: Start difference. First operand 280 states and 350 transitions. Second operand 14 states. [2020-10-12 15:40:52,735 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 63 [2020-10-12 15:40:53,047 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2020-10-12 15:40:53,230 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-12 15:40:53,401 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2020-10-12 15:40:53,604 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-12 15:40:53,766 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2020-10-12 15:40:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:54,266 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2020-10-12 15:40:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:40:54,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:40:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:54,269 INFO L225 Difference]: With dead ends: 334 [2020-10-12 15:40:54,269 INFO L226 Difference]: Without dead ends: 332 [2020-10-12 15:40:54,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:40:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-12 15:40:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 286. [2020-10-12 15:40:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-12 15:40:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 357 transitions. [2020-10-12 15:40:54,293 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 357 transitions. Word has length 33 [2020-10-12 15:40:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:54,293 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 357 transitions. [2020-10-12 15:40:54,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 357 transitions. [2020-10-12 15:40:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:40:54,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:54,294 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:54,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 15:40:54,295 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:54,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:54,295 INFO L82 PathProgramCache]: Analyzing trace with hash 816485198, now seen corresponding path program 12 times [2020-10-12 15:40:54,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:54,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793503151] [2020-10-12 15:40:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:54,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:56,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:56,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:40:56,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:56,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-12 15:40:56,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:40:56,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:56,230 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-12 15:40:56,439 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-12 15:40:56,664 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-12 15:40:56,865 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 15:40:57,113 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-12 15:40:57,247 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-12 15:40:57,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:57,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:57,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:57,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:57,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:57,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:57,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:57,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:57,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:57,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:57,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:57,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793503151] [2020-10-12 15:40:57,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:57,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:57,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9910112] [2020-10-12 15:40:57,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:57,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:57,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:57,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:57,584 INFO L87 Difference]: Start difference. First operand 286 states and 357 transitions. Second operand 14 states. [2020-10-12 15:40:57,835 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 66 [2020-10-12 15:40:58,193 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-10-12 15:40:58,384 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-10-12 15:40:58,635 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2020-10-12 15:40:58,865 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-12 15:40:59,031 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 15:40:59,198 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-12 15:40:59,357 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-12 15:40:59,515 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-12 15:41:00,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:00,056 INFO L93 Difference]: Finished difference Result 354 states and 440 transitions. [2020-10-12 15:41:00,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:41:00,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:41:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:00,059 INFO L225 Difference]: With dead ends: 354 [2020-10-12 15:41:00,059 INFO L226 Difference]: Without dead ends: 347 [2020-10-12 15:41:00,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:41:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-12 15:41:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 296. [2020-10-12 15:41:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-12 15:41:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 369 transitions. [2020-10-12 15:41:00,081 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 369 transitions. Word has length 33 [2020-10-12 15:41:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:00,082 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 369 transitions. [2020-10-12 15:41:00,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:41:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 369 transitions. [2020-10-12 15:41:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:41:00,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:00,083 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:00,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 15:41:00,083 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 818330318, now seen corresponding path program 9 times [2020-10-12 15:41:00,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:00,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094832099] [2020-10-12 15:41:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:00,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:00,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:41:00,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:00,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-12 15:41:00,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:41:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:41:00,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:01,186 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-12 15:41:01,304 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-12 15:41:01,446 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-12 15:41:01,572 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-12 15:41:02,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:02,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:02,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:02,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:02,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:02,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:02,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:02,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:02,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:02,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:02,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:02,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094832099] [2020-10-12 15:41:02,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:02,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:41:02,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602563226] [2020-10-12 15:41:02,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:41:02,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:02,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:41:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:41:02,095 INFO L87 Difference]: Start difference. First operand 296 states and 369 transitions. Second operand 14 states. [2020-10-12 15:41:02,370 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 66 [2020-10-12 15:41:02,670 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-12 15:41:02,844 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-12 15:41:03,021 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2020-10-12 15:41:03,229 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-12 15:41:03,379 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2020-10-12 15:41:03,830 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-12 15:41:04,180 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-12 15:41:04,335 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-12 15:41:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:04,807 INFO L93 Difference]: Finished difference Result 371 states and 463 transitions. [2020-10-12 15:41:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:41:04,808 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:41:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:04,809 INFO L225 Difference]: With dead ends: 371 [2020-10-12 15:41:04,809 INFO L226 Difference]: Without dead ends: 369 [2020-10-12 15:41:04,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:41:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-12 15:41:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 307. [2020-10-12 15:41:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-12 15:41:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 384 transitions. [2020-10-12 15:41:04,833 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 384 transitions. Word has length 33 [2020-10-12 15:41:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:04,833 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 384 transitions. [2020-10-12 15:41:04,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:41:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 384 transitions. [2020-10-12 15:41:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:41:04,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:04,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:04,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 15:41:04,835 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:04,835 INFO L82 PathProgramCache]: Analyzing trace with hash 818332240, now seen corresponding path program 13 times [2020-10-12 15:41:04,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:04,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737599829] [2020-10-12 15:41:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:04,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:06,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:06,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:41:06,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1822 [2020-10-12 15:41:06,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:41:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:41:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:06,847 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-12 15:41:06,958 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-12 15:41:07,082 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-12 15:41:07,335 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-12 15:41:07,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:07,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:07,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:07,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:07,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:07,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:07,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:07,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:07,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737599829] [2020-10-12 15:41:07,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:07,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:41:07,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590296980] [2020-10-12 15:41:07,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:41:07,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:41:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:41:07,881 INFO L87 Difference]: Start difference. First operand 307 states and 384 transitions. Second operand 15 states. [2020-10-12 15:41:08,194 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-10-12 15:41:08,571 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2020-10-12 15:41:08,905 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 70 [2020-10-12 15:41:09,115 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-12 15:41:09,316 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-12 15:41:09,659 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2020-10-12 15:41:10,002 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-12 15:41:10,160 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-12 15:41:10,359 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 49 [2020-10-12 15:41:10,549 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2020-10-12 15:41:10,709 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 15:41:10,993 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-12 15:41:11,210 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 51 [2020-10-12 15:41:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:11,681 INFO L93 Difference]: Finished difference Result 352 states and 442 transitions. [2020-10-12 15:41:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:41:11,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-12 15:41:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:11,683 INFO L225 Difference]: With dead ends: 352 [2020-10-12 15:41:11,683 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:41:11,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:41:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:41:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2020-10-12 15:41:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 15:41:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-10-12 15:41:11,691 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 33 [2020-10-12 15:41:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:11,691 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-10-12 15:41:11,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:41:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-10-12 15:41:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:41:11,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:11,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:11,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 15:41:11,692 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash 423458188, now seen corresponding path program 14 times [2020-10-12 15:41:11,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:11,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661612277] [2020-10-12 15:41:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:11,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:12,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:13,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:13,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:41:13,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:41:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1851 [2020-10-12 15:41:13,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:41:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:41:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:13,796 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-12 15:41:13,914 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-12 15:41:14,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:14,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:14,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:14,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:14,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:14,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:14,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:14,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:14,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:14,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:14,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:14,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661612277] [2020-10-12 15:41:14,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:14,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:41:14,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943894175] [2020-10-12 15:41:14,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:41:14,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:14,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:41:14,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:41:14,570 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 14 states. [2020-10-12 15:41:14,831 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 72 [2020-10-12 15:41:15,351 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2020-10-12 15:41:15,879 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-12 15:41:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:16,454 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-10-12 15:41:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:41:16,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:41:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:16,456 INFO L225 Difference]: With dead ends: 113 [2020-10-12 15:41:16,456 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 15:41:16,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:41:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 15:41:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-12 15:41:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 15:41:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-10-12 15:41:16,464 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 33 [2020-10-12 15:41:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:16,465 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-10-12 15:41:16,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:41:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-10-12 15:41:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:41:16,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:16,465 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:16,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 15:41:16,466 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:16,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash 425305230, now seen corresponding path program 15 times [2020-10-12 15:41:16,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:16,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043188607] [2020-10-12 15:41:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:16,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:16,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:18,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:19,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:19,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:41:19,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:41:19,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3062 [2020-10-12 15:41:19,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:41:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:19,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:41:19,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:19,831 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-12 15:41:19,963 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 15:41:20,140 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-12 15:41:20,557 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 16 [2020-10-12 15:41:20,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:20,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:20,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:20,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:20,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:20,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:20,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:20,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:20,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:20,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:20,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:20,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043188607] [2020-10-12 15:41:20,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:20,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:41:20,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692741576] [2020-10-12 15:41:20,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:41:20,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:20,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:41:20,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:41:20,814 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 14 states. [2020-10-12 15:41:21,102 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 75 [2020-10-12 15:41:21,532 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2020-10-12 15:41:21,745 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 15:41:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:22,224 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-10-12 15:41:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:41:22,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-12 15:41:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:22,226 INFO L225 Difference]: With dead ends: 97 [2020-10-12 15:41:22,226 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 15:41:22,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:41:22,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 15:41:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-10-12 15:41:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:41:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-10-12 15:41:22,234 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 33 [2020-10-12 15:41:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:22,234 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-10-12 15:41:22,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:41:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-10-12 15:41:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:41:22,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:22,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:22,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 15:41:22,235 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:22,236 INFO L82 PathProgramCache]: Analyzing trace with hash 550380789, now seen corresponding path program 10 times [2020-10-12 15:41:22,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:22,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508290262] [2020-10-12 15:41:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:22,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:22,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:22,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:23,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:25,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:25,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:41:25,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:41:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2852 [2020-10-12 15:41:25,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:41:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:41:25,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:26,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:26,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:26,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:26,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:26,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:26,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:26,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:26,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:26,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:26,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:26,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:26,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508290262] [2020-10-12 15:41:26,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:26,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:41:26,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414333656] [2020-10-12 15:41:26,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:41:26,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:41:26,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:41:26,058 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 17 states. [2020-10-12 15:41:26,298 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-12 15:41:26,563 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-12 15:41:26,806 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 15:41:27,335 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-12 15:41:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:28,176 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2020-10-12 15:41:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:41:28,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 15:41:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:28,179 INFO L225 Difference]: With dead ends: 110 [2020-10-12 15:41:28,179 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 15:41:28,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:41:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 15:41:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2020-10-12 15:41:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 15:41:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-10-12 15:41:28,187 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 38 [2020-10-12 15:41:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:28,187 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-10-12 15:41:28,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:41:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-10-12 15:41:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:41:28,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:28,188 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:28,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 15:41:28,188 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash 550382711, now seen corresponding path program 16 times [2020-10-12 15:41:28,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:28,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568306555] [2020-10-12 15:41:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:28,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:28,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:28,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:29,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:30,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:31,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:31,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:41:31,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:41:31,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3289 [2020-10-12 15:41:31,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:31,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:31,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:31,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:41:31,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:31,687 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-12 15:41:31,802 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-12 15:41:31,949 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-12 15:41:32,074 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-12 15:41:32,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:32,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:32,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:32,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:32,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:32,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:32,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:32,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:32,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568306555] [2020-10-12 15:41:32,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:32,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:32,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240025771] [2020-10-12 15:41:32,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:32,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:32,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:32,740 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 16 states. [2020-10-12 15:41:33,030 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2020-10-12 15:41:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:34,002 INFO L93 Difference]: Finished difference Result 119 states and 149 transitions. [2020-10-12 15:41:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:41:34,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:41:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:34,004 INFO L225 Difference]: With dead ends: 119 [2020-10-12 15:41:34,005 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 15:41:34,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:41:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 15:41:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2020-10-12 15:41:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 15:41:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-10-12 15:41:34,012 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 38 [2020-10-12 15:41:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:34,012 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-10-12 15:41:34,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-10-12 15:41:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:41:34,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:34,013 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:34,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 15:41:34,013 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:34,014 INFO L82 PathProgramCache]: Analyzing trace with hash 155506737, now seen corresponding path program 11 times [2020-10-12 15:41:34,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:34,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951225122] [2020-10-12 15:41:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:34,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:34,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:35,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:36,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:36,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:36,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:41:36,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:41:36,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2676 [2020-10-12 15:41:36,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:41:36,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:36,958 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-10-12 15:41:37,381 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 15:41:37,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:37,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:37,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:37,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:37,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:37,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:37,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:37,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:37,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951225122] [2020-10-12 15:41:37,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:37,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:37,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974983720] [2020-10-12 15:41:37,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:37,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:37,879 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 16 states. [2020-10-12 15:41:38,131 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-12 15:41:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:39,682 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2020-10-12 15:41:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:41:39,683 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:41:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:39,684 INFO L225 Difference]: With dead ends: 102 [2020-10-12 15:41:39,684 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 15:41:39,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:41:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 15:41:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-10-12 15:41:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 15:41:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2020-10-12 15:41:39,693 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 38 [2020-10-12 15:41:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:39,693 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2020-10-12 15:41:39,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2020-10-12 15:41:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:41:39,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:39,694 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:39,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 15:41:39,694 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash -731329931, now seen corresponding path program 12 times [2020-10-12 15:41:39,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:39,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517612797] [2020-10-12 15:41:39,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:39,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:39,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:41,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:44,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:44,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:41:44,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:41:44,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4941 [2020-10-12 15:41:44,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:41:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:41:44,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:44,869 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-12 15:41:44,999 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-12 15:41:45,134 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-12 15:41:45,378 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-12 15:41:45,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:45,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:45,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:45,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:45,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:45,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:45,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:45,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:45,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:45,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517612797] [2020-10-12 15:41:45,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:45,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:41:45,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652683214] [2020-10-12 15:41:45,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:41:45,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:41:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:41:45,927 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 18 states. [2020-10-12 15:41:46,204 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-10-12 15:41:46,533 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-12 15:41:46,674 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-12 15:41:47,502 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-12 15:41:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:47,923 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2020-10-12 15:41:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:41:47,924 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-12 15:41:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:47,926 INFO L225 Difference]: With dead ends: 108 [2020-10-12 15:41:47,926 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:41:47,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:41:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:41:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 15:41:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:41:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2020-10-12 15:41:47,932 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 38 [2020-10-12 15:41:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:47,933 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2020-10-12 15:41:47,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:41:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2020-10-12 15:41:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:41:47,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:47,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:47,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 15:41:47,934 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -729480967, now seen corresponding path program 17 times [2020-10-12 15:41:47,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:47,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921632549] [2020-10-12 15:41:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:48,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:48,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:49,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:51,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:51,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:41:51,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:41:51,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3390 [2020-10-12 15:41:51,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:51,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:51,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:51,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:41:51,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:51,672 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-12 15:41:51,786 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 15:41:52,181 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-12 15:41:52,487 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-12 15:41:52,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:52,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:52,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:52,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:52,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:52,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:52,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:52,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:52,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:52,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:52,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:53,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921632549] [2020-10-12 15:41:53,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:53,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:53,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987646601] [2020-10-12 15:41:53,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:53,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:53,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:53,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:53,010 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 16 states. [2020-10-12 15:41:53,301 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-12 15:41:54,044 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-12 15:41:54,268 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 15:41:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:54,708 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-10-12 15:41:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:41:54,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:41:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:54,710 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:41:54,711 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:41:54,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:41:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:41:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-12 15:41:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:41:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-10-12 15:41:54,717 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 38 [2020-10-12 15:41:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:54,717 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-10-12 15:41:54,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-10-12 15:41:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:41:54,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:54,718 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:54,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 15:41:54,718 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1124356941, now seen corresponding path program 13 times [2020-10-12 15:41:54,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:54,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450888588] [2020-10-12 15:41:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:54,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:56,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:56,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:41:56,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:56,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2093 [2020-10-12 15:41:56,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:41:56,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:57,152 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-12 15:41:57,513 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-12 15:41:58,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:58,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:58,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:58,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:58,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:58,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:58,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:58,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450888588] [2020-10-12 15:41:58,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:58,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:58,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075727783] [2020-10-12 15:41:58,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:58,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:58,139 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 16 states. [2020-10-12 15:41:58,448 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 69 [2020-10-12 15:41:58,838 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-12 15:41:59,092 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-12 15:41:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:59,938 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2020-10-12 15:41:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:41:59,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:41:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:59,940 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:41:59,941 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:41:59,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:41:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:41:59,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2020-10-12 15:41:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:41:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-10-12 15:41:59,947 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 38 [2020-10-12 15:41:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:59,947 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-10-12 15:41:59,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-10-12 15:41:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:41:59,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:59,948 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:59,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 15:41:59,948 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1124355019, now seen corresponding path program 18 times [2020-10-12 15:41:59,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:59,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131807011] [2020-10-12 15:41:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:00,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:00,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:01,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:02,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:02,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:42:02,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2225 [2020-10-12 15:42:02,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:42:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:42:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:02,425 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-12 15:42:02,565 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-12 15:42:02,710 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-12 15:42:02,866 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-12 15:42:03,038 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-12 15:42:03,177 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-12 15:42:03,364 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-12 15:42:03,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:03,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:03,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:03,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:03,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:03,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:42:03,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:03,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:03,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:03,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:03,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:03,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131807011] [2020-10-12 15:42:03,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:03,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:42:03,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955639683] [2020-10-12 15:42:03,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:42:03,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:03,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:42:03,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:03,765 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 16 states. [2020-10-12 15:42:03,998 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-12 15:42:04,314 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-12 15:42:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:04,874 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2020-10-12 15:42:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:42:04,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:42:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:04,876 INFO L225 Difference]: With dead ends: 91 [2020-10-12 15:42:04,876 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 15:42:04,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:42:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 15:42:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-10-12 15:42:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:42:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-10-12 15:42:04,883 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 38 [2020-10-12 15:42:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:04,883 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-10-12 15:42:04,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:42:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-10-12 15:42:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:42:04,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:04,884 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:04,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 15:42:04,884 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:04,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1122507977, now seen corresponding path program 19 times [2020-10-12 15:42:04,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:04,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705856959] [2020-10-12 15:42:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:04,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:05,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:06,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:06,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:07,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:08,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:09,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:09,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:42:09,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:42:09,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4207 [2020-10-12 15:42:09,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:42:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:09,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:42:09,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:09,460 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-12 15:42:09,575 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-12 15:42:09,724 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-12 15:42:09,849 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-12 15:42:10,033 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-12 15:42:10,179 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-12 15:42:10,366 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-12 15:42:10,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:10,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:10,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:10,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:10,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:10,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:10,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:10,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:10,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705856959] [2020-10-12 15:42:10,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:10,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:42:10,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726865996] [2020-10-12 15:42:10,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:42:10,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:42:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:10,873 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 16 states. [2020-10-12 15:42:11,181 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-10-12 15:42:11,624 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-10-12 15:42:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:12,413 INFO L93 Difference]: Finished difference Result 93 states and 115 transitions. [2020-10-12 15:42:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:42:12,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:42:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:12,415 INFO L225 Difference]: With dead ends: 93 [2020-10-12 15:42:12,415 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:42:12,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:42:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:42:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2020-10-12 15:42:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:42:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-10-12 15:42:12,422 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 38 [2020-10-12 15:42:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:12,422 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-10-12 15:42:12,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:42:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-10-12 15:42:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:42:12,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:12,423 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:12,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 15:42:12,424 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:12,424 INFO L82 PathProgramCache]: Analyzing trace with hash -269114703, now seen corresponding path program 14 times [2020-10-12 15:42:12,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:12,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381806064] [2020-10-12 15:42:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:12,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:13,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:14,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:15,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:15,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:42:15,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:15,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2842 [2020-10-12 15:42:15,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:15,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:42:15,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:15,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:42:15,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:15,643 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-12 15:42:15,812 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-12 15:42:15,977 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-12 15:42:16,150 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-12 15:42:16,299 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-12 15:42:16,500 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-12 15:42:17,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:17,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:17,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:17,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:17,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:17,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:17,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:17,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381806064] [2020-10-12 15:42:17,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:17,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:42:17,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152867841] [2020-10-12 15:42:17,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:42:17,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:42:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:17,036 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 16 states. [2020-10-12 15:42:17,316 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 66 [2020-10-12 15:42:17,680 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-12 15:42:18,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:18,986 INFO L93 Difference]: Finished difference Result 169 states and 216 transitions. [2020-10-12 15:42:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:42:18,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:42:18,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:18,991 INFO L225 Difference]: With dead ends: 169 [2020-10-12 15:42:18,991 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 15:42:18,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:42:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 15:42:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-10-12 15:42:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-12 15:42:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 175 transitions. [2020-10-12 15:42:19,005 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 175 transitions. Word has length 38 [2020-10-12 15:42:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:19,005 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 175 transitions. [2020-10-12 15:42:19,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:42:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 175 transitions. [2020-10-12 15:42:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:42:19,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:19,006 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:19,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 15:42:19,007 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash -269112781, now seen corresponding path program 20 times [2020-10-12 15:42:19,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:19,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350227980] [2020-10-12 15:42:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:19,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:21,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:23,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:24,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:24,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:24,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:42:24,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:42:24,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5359 [2020-10-12 15:42:24,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:24,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:42:24,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:24,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:42:24,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:24,637 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-12 15:42:24,865 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-12 15:42:25,002 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-12 15:42:25,167 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-12 15:42:25,314 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-12 15:42:25,473 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-12 15:42:25,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:25,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:25,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:25,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:25,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:25,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:25,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:25,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:25,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:25,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:25,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:25,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350227980] [2020-10-12 15:42:25,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:25,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:42:25,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945836341] [2020-10-12 15:42:25,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:42:25,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:25,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:42:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:25,925 INFO L87 Difference]: Start difference. First operand 132 states and 175 transitions. Second operand 16 states. [2020-10-12 15:42:26,266 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 66 [2020-10-12 15:42:26,722 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 73 [2020-10-12 15:42:27,022 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2020-10-12 15:42:27,219 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-12 15:42:27,410 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-12 15:42:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:28,452 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2020-10-12 15:42:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:42:28,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:42:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:28,454 INFO L225 Difference]: With dead ends: 170 [2020-10-12 15:42:28,454 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 15:42:28,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:42:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 15:42:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2020-10-12 15:42:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 15:42:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 194 transitions. [2020-10-12 15:42:28,465 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 194 transitions. Word has length 38 [2020-10-12 15:42:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:28,465 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 194 transitions. [2020-10-12 15:42:28,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:42:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 194 transitions. [2020-10-12 15:42:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:42:28,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:28,466 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:28,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 15:42:28,467 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:28,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:28,467 INFO L82 PathProgramCache]: Analyzing trace with hash -267265739, now seen corresponding path program 21 times [2020-10-12 15:42:28,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:28,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247369786] [2020-10-12 15:42:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:28,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:29,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:31,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:31,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:42:31,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:31,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2691 [2020-10-12 15:42:31,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:31,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:42:31,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:31,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:42:31,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:31,503 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2020-10-12 15:42:31,635 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-12 15:42:31,765 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-12 15:42:32,048 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 15:42:32,199 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-12 15:42:32,365 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-12 15:42:32,611 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-12 15:42:32,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:32,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:32,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:32,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:32,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:32,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:32,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:32,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:32,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247369786] [2020-10-12 15:42:32,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:32,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:42:32,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132121919] [2020-10-12 15:42:32,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:42:32,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:32,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:42:32,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:32,918 INFO L87 Difference]: Start difference. First operand 147 states and 194 transitions. Second operand 16 states. [2020-10-12 15:42:33,247 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2020-10-12 15:42:33,658 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2020-10-12 15:42:33,931 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-12 15:42:34,124 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-12 15:42:34,327 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-12 15:42:34,537 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-12 15:42:34,892 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-12 15:42:35,141 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-12 15:42:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:35,509 INFO L93 Difference]: Finished difference Result 174 states and 228 transitions. [2020-10-12 15:42:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:42:35,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:42:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:35,511 INFO L225 Difference]: With dead ends: 174 [2020-10-12 15:42:35,511 INFO L226 Difference]: Without dead ends: 161 [2020-10-12 15:42:35,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:42:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-12 15:42:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2020-10-12 15:42:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 15:42:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 194 transitions. [2020-10-12 15:42:35,520 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 194 transitions. Word has length 38 [2020-10-12 15:42:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:35,520 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 194 transitions. [2020-10-12 15:42:35,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:42:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 194 transitions. [2020-10-12 15:42:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:42:35,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:35,521 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:35,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 15:42:35,521 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash -662141713, now seen corresponding path program 15 times [2020-10-12 15:42:35,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:35,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744976620] [2020-10-12 15:42:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:35,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:36,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:36,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:42:36,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:36,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1236 [2020-10-12 15:42:36,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:42:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:42:36,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:37,044 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-12 15:42:37,201 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-12 15:42:37,372 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-12 15:42:37,507 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-12 15:42:37,645 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 15:42:37,914 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-12 15:42:38,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:38,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:38,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:38,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:38,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:38,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:38,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:38,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:38,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:38,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:38,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:38,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744976620] [2020-10-12 15:42:38,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:38,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:42:38,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900772043] [2020-10-12 15:42:38,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:42:38,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:42:38,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:38,397 INFO L87 Difference]: Start difference. First operand 147 states and 194 transitions. Second operand 16 states. [2020-10-12 15:42:38,659 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2020-10-12 15:42:38,942 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69