/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/forester-heap/dll-simple-white-blue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:20:29,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:20:29,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:20:29,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:20:29,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:20:29,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:20:29,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:20:29,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:20:29,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:20:29,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:20:29,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:20:29,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:20:29,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:20:29,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:20:29,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:20:29,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:20:29,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:20:29,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:20:29,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:20:29,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:20:29,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:20:29,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:20:29,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:20:29,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:20:29,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:20:29,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:20:29,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:20:29,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:20:29,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:20:29,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:20:29,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:20:29,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:20:29,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:20:29,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:20:29,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:20:29,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:20:29,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:20:29,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:20:29,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:20:29,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:20:29,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:20:29,150 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 [2020-10-14 23:20:29,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:20:29,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:20:29,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:20:29,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:20:29,209 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:20:29,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:20:29,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:20:29,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:20:29,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:20:29,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:20:29,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:20:29,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:20:29,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:20:29,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:20:29,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:20:29,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:20:29,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:20:29,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:20:29,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:20:29,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:20:29,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:20:29,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:20:29,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:20:29,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:20:29,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:20:29,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:20:29,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:20:29,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:20:29,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:20:29,216 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:20:29,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:20:29,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:20:29,550 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:20:29,551 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:20:29,552 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:20:29,552 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i [2020-10-14 23:20:29,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27f0f3e44/c9493eeaeeda4060b09b9375e74e9ee7/FLAGebc0f440f [2020-10-14 23:20:30,240 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:20:30,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i [2020-10-14 23:20:30,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27f0f3e44/c9493eeaeeda4060b09b9375e74e9ee7/FLAGebc0f440f [2020-10-14 23:20:30,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27f0f3e44/c9493eeaeeda4060b09b9375e74e9ee7 [2020-10-14 23:20:30,474 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:20:30,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:20:30,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:20:30,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:20:30,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:20:30,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:20:30" (1/1) ... [2020-10-14 23:20:30,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742cc583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:30, skipping insertion in model container [2020-10-14 23:20:30,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:20:30" (1/1) ... [2020-10-14 23:20:30,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:20:30,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:20:30,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:20:30,964 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:20:31,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:20:31,080 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:20:31,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31 WrapperNode [2020-10-14 23:20:31,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:20:31,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:20:31,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:20:31,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:20:31,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (1/1) ... [2020-10-14 23:20:31,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (1/1) ... [2020-10-14 23:20:31,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (1/1) ... [2020-10-14 23:20:31,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (1/1) ... [2020-10-14 23:20:31,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (1/1) ... [2020-10-14 23:20:31,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (1/1) ... [2020-10-14 23:20:31,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (1/1) ... [2020-10-14 23:20:31,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:20:31,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:20:31,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:20:31,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:20:31,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (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 [2020-10-14 23:20:31,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:20:31,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:20:31,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:20:31,221 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:20:31,221 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:20:31,221 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:20:31,221 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:20:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:20:31,229 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:20:31,229 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:20:31,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:20:31,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:20:31,230 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:20:31,230 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:20:31,230 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:20:31,231 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:20:31,231 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:20:31,231 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:20:31,231 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:20:31,231 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:20:31,231 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:20:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:20:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:20:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:20:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:20:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:20:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:20:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:20:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:20:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:20:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:20:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:20:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:20:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:20:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:20:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:20:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:20:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:20:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:20:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:20:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:20:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:20:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:20:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:20:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:20:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:20:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:20:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:20:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:20:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:20:31,236 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:20:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:20:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:20:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:20:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:20:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:20:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:20:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:20:31,238 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:20:31,238 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:20:31,238 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:20:31,238 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:20:31,238 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:20:31,238 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:20:31,239 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:20:31,239 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:20:31,239 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:20:31,239 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:20:31,239 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:20:31,239 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:20:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:20:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:20:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:20:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:20:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:20:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:20:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:20:31,240 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:20:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:20:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:20:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:20:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:20:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:20:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:20:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:20:31,241 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:20:31,242 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:20:31,242 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:20:31,242 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:20:31,242 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:20:31,242 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:20:31,242 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:20:31,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:20:31,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:20:31,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:20:31,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:20:31,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:20:31,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:20:31,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:20:31,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:20:31,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:20:31,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:20:31,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:20:31,826 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:20:31,826 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-14 23:20:31,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:20:31 BoogieIcfgContainer [2020-10-14 23:20:31,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:20:31,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:20:31,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:20:31,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:20:31,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:20:30" (1/3) ... [2020-10-14 23:20:31,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6d8abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:20:31, skipping insertion in model container [2020-10-14 23:20:31,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:31" (2/3) ... [2020-10-14 23:20:31,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6d8abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:20:31, skipping insertion in model container [2020-10-14 23:20:31,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:20:31" (3/3) ... [2020-10-14 23:20:31,840 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2020-10-14 23:20:31,852 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:20:31,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:20:31,875 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:20:31,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:20:31,903 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:20:31,903 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:20:31,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:20:31,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:20:31,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:20:31,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:20:31,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:20:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-14 23:20:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:20:31,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:31,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:31,934 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1881548223, now seen corresponding path program 1 times [2020-10-14 23:20:31,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:31,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613327380] [2020-10-14 23:20:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:32,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:32,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:32,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:32,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:20:32,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-14 23:20:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:32,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:20:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:20:32,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:20:32,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:32,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:32,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:32,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:32,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:32,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 23:20:32,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:32,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:32,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:32,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:32,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613327380] [2020-10-14 23:20:32,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:32,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 23:20:32,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625762122] [2020-10-14 23:20:32,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:20:32,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:32,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:20:32,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:32,903 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 8 states. [2020-10-14 23:20:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:33,447 INFO L93 Difference]: Finished difference Result 95 states and 151 transitions. [2020-10-14 23:20:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:20:33,450 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-14 23:20:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:33,463 INFO L225 Difference]: With dead ends: 95 [2020-10-14 23:20:33,463 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:20:33,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:20:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:20:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2020-10-14 23:20:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:20:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-10-14 23:20:33,516 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-10-14 23:20:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:33,516 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-10-14 23:20:33,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:20:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-10-14 23:20:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:20:33,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:33,518 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:33,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:20:33,519 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1740484627, now seen corresponding path program 1 times [2020-10-14 23:20:33,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:33,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393067665] [2020-10-14 23:20:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:33,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:33,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:33,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:34,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:34,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:20:34,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:34,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-14 23:20:34,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:34,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:20:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:20:34,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:34,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:34,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:34,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:34,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:34,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:34,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:20:34,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:34,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:34,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:34,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393067665] [2020-10-14 23:20:34,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:34,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:20:34,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100940737] [2020-10-14 23:20:34,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:20:34,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:20:34,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:34,210 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 8 states. [2020-10-14 23:20:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:34,529 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-10-14 23:20:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:20:34,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-14 23:20:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:34,531 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:20:34,531 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:20:34,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:20:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:20:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-10-14 23:20:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:20:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-10-14 23:20:34,541 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2020-10-14 23:20:34,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:34,542 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-10-14 23:20:34,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:20:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-10-14 23:20:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:20:34,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:34,543 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:34,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:20:34,544 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:34,544 INFO L82 PathProgramCache]: Analyzing trace with hash 993209737, now seen corresponding path program 1 times [2020-10-14 23:20:34,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:34,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213268822] [2020-10-14 23:20:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:34,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:34,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:34,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:20:34,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:34,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-14 23:20:34,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:34,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:34,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:20:34,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:34,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:20:34,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:20:35,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:35,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:35,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:35,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:35,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:20:35,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:35,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:35,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:35,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213268822] [2020-10-14 23:20:35,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:35,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:20:35,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424681336] [2020-10-14 23:20:35,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:20:35,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:35,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:20:35,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:20:35,101 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 9 states. [2020-10-14 23:20:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:35,655 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2020-10-14 23:20:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:20:35,655 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-14 23:20:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:35,657 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:20:35,657 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:20:35,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:20:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:20:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2020-10-14 23:20:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:20:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-14 23:20:35,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2020-10-14 23:20:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:35,668 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-14 23:20:35,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:20:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-14 23:20:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:20:35,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:35,670 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:35,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:20:35,670 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1213827838, now seen corresponding path program 1 times [2020-10-14 23:20:35,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:35,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285439019] [2020-10-14 23:20:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:35,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:35,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:20:35,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:35,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-14 23:20:35,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:35,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:35,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:20:35,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:35,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:20:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:35,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:35,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:35,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:35,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:35,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:35,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:35,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:35,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:35,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:35,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285439019] [2020-10-14 23:20:35,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:35,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:20:35,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765066465] [2020-10-14 23:20:35,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:20:35,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:35,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:20:35,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:35,933 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 8 states. [2020-10-14 23:20:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:36,434 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-10-14 23:20:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:20:36,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 23:20:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:36,436 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:20:36,436 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:20:36,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:20:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:20:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2020-10-14 23:20:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:20:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-14 23:20:36,445 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 20 [2020-10-14 23:20:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:36,445 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-14 23:20:36,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:20:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-14 23:20:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:20:36,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:36,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:36,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:20:36,448 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash -928390504, now seen corresponding path program 2 times [2020-10-14 23:20:36,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:36,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725525384] [2020-10-14 23:20:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:36,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:36,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:36,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:20:36,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:36,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-14 23:20:36,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:36,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:20:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:20:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:20:36,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:36,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:36,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:36,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:36,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:36,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:36,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:36,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:36,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:36,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:36,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:36,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:36,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:20:36,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725525384] [2020-10-14 23:20:36,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:36,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:20:36,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311389842] [2020-10-14 23:20:36,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:20:36,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:20:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:20:36,606 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 6 states. [2020-10-14 23:20:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:36,753 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 23:20:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:20:36,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 23:20:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:36,755 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:20:36,755 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:20:36,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:20:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-10-14 23:20:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:20:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-14 23:20:36,762 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 21 [2020-10-14 23:20:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:36,762 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-14 23:20:36,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:20:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-14 23:20:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:20:36,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:36,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:36,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:20:36,764 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:36,765 INFO L82 PathProgramCache]: Analyzing trace with hash 507319878, now seen corresponding path program 1 times [2020-10-14 23:20:36,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:36,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358180019] [2020-10-14 23:20:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:37,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:20:37,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:20:37,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-14 23:20:37,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:37,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:37,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:20:37,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:37,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:20:37,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:37,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:37,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:37,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:37,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:37,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:37,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:37,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:37,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:37,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:37,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:37,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:37,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358180019] [2020-10-14 23:20:37,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:37,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:20:37,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207905714] [2020-10-14 23:20:37,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:20:37,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:20:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:20:37,109 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 6 states. [2020-10-14 23:20:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:37,404 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-14 23:20:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:20:37,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 23:20:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:37,406 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:20:37,406 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 23:20:37,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 23:20:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-10-14 23:20:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:20:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-14 23:20:37,423 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2020-10-14 23:20:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:37,423 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-14 23:20:37,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:20:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-14 23:20:37,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:20:37,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:37,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:37,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:20:37,427 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:37,428 INFO L82 PathProgramCache]: Analyzing trace with hash -302026748, now seen corresponding path program 1 times [2020-10-14 23:20:37,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:37,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421221881] [2020-10-14 23:20:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:37,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:37,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:20:37,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:20:37,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-14 23:20:37,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:37,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:37,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:20:37,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:37,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:20:37,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:38,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:38,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:38,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:38,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:38,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:20:38,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:38,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:38,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:38,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421221881] [2020-10-14 23:20:38,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:38,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:20:38,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871109044] [2020-10-14 23:20:38,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:20:38,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:20:38,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:20:38,033 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 7 states. [2020-10-14 23:20:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:38,290 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-10-14 23:20:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:20:38,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-14 23:20:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:38,292 INFO L225 Difference]: With dead ends: 77 [2020-10-14 23:20:38,292 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:20:38,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:20:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2020-10-14 23:20:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:20:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-14 23:20:38,307 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 21 [2020-10-14 23:20:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:38,308 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-14 23:20:38,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:20:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-14 23:20:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:20:38,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:38,312 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:38,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:20:38,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:38,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1747671044, now seen corresponding path program 2 times [2020-10-14 23:20:38,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:38,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099646407] [2020-10-14 23:20:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:38,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:38,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:20:38,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-14 23:20:38,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:38,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:38,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:20:38,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:38,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:20:38,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:38,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:38,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:38,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:38,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:38,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:38,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:38,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:38,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:38,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099646407] [2020-10-14 23:20:38,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:38,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:38,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551465042] [2020-10-14 23:20:38,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:38,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:38,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:38,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:38,900 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 10 states. [2020-10-14 23:20:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:39,459 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2020-10-14 23:20:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:20:39,460 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 23:20:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:39,461 INFO L225 Difference]: With dead ends: 72 [2020-10-14 23:20:39,461 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:20:39,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:20:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:20:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2020-10-14 23:20:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:20:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-14 23:20:39,467 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 21 [2020-10-14 23:20:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:39,468 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-14 23:20:39,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-14 23:20:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:20:39,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:39,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:39,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:20:39,469 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:39,470 INFO L82 PathProgramCache]: Analyzing trace with hash 699636199, now seen corresponding path program 1 times [2020-10-14 23:20:39,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:39,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005262533] [2020-10-14 23:20:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:39,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:39,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:20:39,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:39,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-14 23:20:39,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:39,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:20:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:20:39,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:39,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:39,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:39,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:39,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:39,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:39,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:39,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:39,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:39,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:39,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:39,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:39,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:39,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005262533] [2020-10-14 23:20:39,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:39,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:39,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385252480] [2020-10-14 23:20:39,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:39,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:39,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:39,839 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 10 states. [2020-10-14 23:20:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:40,597 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-10-14 23:20:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:20:40,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-14 23:20:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:40,598 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:20:40,599 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 23:20:40,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:20:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 23:20:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2020-10-14 23:20:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:20:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-14 23:20:40,616 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 22 [2020-10-14 23:20:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:40,616 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-14 23:20:40,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-14 23:20:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:20:40,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:40,619 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:40,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:20:40,620 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:40,620 INFO L82 PathProgramCache]: Analyzing trace with hash -981767607, now seen corresponding path program 1 times [2020-10-14 23:20:40,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:40,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678747850] [2020-10-14 23:20:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:40,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:40,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:20:40,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:40,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-14 23:20:40,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:40,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:20:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:20:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:20:40,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:40,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:40,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:40,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:40,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:40,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:40,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:40,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:40,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:40,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:40,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678747850] [2020-10-14 23:20:40,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:40,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:20:40,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289408788] [2020-10-14 23:20:40,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:20:40,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:40,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:20:40,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:20:40,781 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 7 states. [2020-10-14 23:20:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:40,977 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-14 23:20:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:20:40,978 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-14 23:20:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:40,978 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:20:40,979 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 23:20:40,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:20:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 23:20:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-14 23:20:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 23:20:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-10-14 23:20:40,986 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 23 [2020-10-14 23:20:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:40,987 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-10-14 23:20:40,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:20:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-10-14 23:20:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:20:40,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:40,988 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:40,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:20:40,988 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash -304837119, now seen corresponding path program 1 times [2020-10-14 23:20:40,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:40,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521563981] [2020-10-14 23:20:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:41,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:41,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:41,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:41,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:20:41,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:41,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-14 23:20:41,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:41,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:20:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:20:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:42,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:42,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:42,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:42,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:42,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:42,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:42,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:42,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:42,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:42,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:42,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:42,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:42,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521563981] [2020-10-14 23:20:42,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:42,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:20:42,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585612772] [2020-10-14 23:20:42,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:20:42,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:42,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:20:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:20:42,025 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 11 states. [2020-10-14 23:20:42,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:42,876 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2020-10-14 23:20:42,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:20:42,877 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-14 23:20:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:42,878 INFO L225 Difference]: With dead ends: 92 [2020-10-14 23:20:42,878 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 23:20:42,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:20:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 23:20:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 64. [2020-10-14 23:20:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 23:20:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-10-14 23:20:42,887 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 23 [2020-10-14 23:20:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:42,888 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-10-14 23:20:42,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:20:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-10-14 23:20:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:20:42,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:42,890 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:42,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:20:42,890 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1097723023, now seen corresponding path program 1 times [2020-10-14 23:20:42,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:42,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198511848] [2020-10-14 23:20:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:42,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:43,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:43,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:20:43,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:43,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-14 23:20:43,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:43,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:20:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:20:43,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:43,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:43,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:43,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:43,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:43,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:43,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:43,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:43,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:43,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:43,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:43,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:43,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:43,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198511848] [2020-10-14 23:20:43,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:43,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:43,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936372092] [2020-10-14 23:20:43,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:43,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:43,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:43,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:43,900 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 10 states. [2020-10-14 23:20:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:44,394 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-10-14 23:20:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:20:44,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 23:20:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:44,396 INFO L225 Difference]: With dead ends: 94 [2020-10-14 23:20:44,396 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 23:20:44,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 23:20:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2020-10-14 23:20:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 23:20:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2020-10-14 23:20:44,407 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 24 [2020-10-14 23:20:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:44,408 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2020-10-14 23:20:44,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2020-10-14 23:20:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:20:44,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:44,411 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:44,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:20:44,412 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1292573068, now seen corresponding path program 2 times [2020-10-14 23:20:44,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:44,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133298844] [2020-10-14 23:20:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:44,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:44,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:44,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:20:44,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:44,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-14 23:20:44,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:44,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:44,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:20:44,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:44,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:20:44,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:45,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:45,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:45,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:45,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:45,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:45,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:45,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:45,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:45,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:45,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:45,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133298844] [2020-10-14 23:20:45,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:45,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:20:45,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956508667] [2020-10-14 23:20:45,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:20:45,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:45,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:20:45,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:20:45,181 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand 11 states. [2020-10-14 23:20:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:46,338 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2020-10-14 23:20:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:20:46,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-14 23:20:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:46,341 INFO L225 Difference]: With dead ends: 119 [2020-10-14 23:20:46,341 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 23:20:46,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:20:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 23:20:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 76. [2020-10-14 23:20:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:20:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-10-14 23:20:46,349 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 24 [2020-10-14 23:20:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:46,350 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-10-14 23:20:46,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:20:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-10-14 23:20:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:20:46,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:46,351 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:46,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:20:46,351 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:46,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash -596219703, now seen corresponding path program 3 times [2020-10-14 23:20:46,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:46,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445995187] [2020-10-14 23:20:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:46,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:46,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:46,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:20:46,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:46,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-14 23:20:46,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:46,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:46,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:20:46,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:46,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:20:46,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:46,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:46,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:46,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:46,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:46,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:46,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:46,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:46,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:46,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:46,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445995187] [2020-10-14 23:20:46,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:46,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:46,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142194440] [2020-10-14 23:20:46,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:46,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:46,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:46,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:46,682 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 10 states. [2020-10-14 23:20:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:47,668 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2020-10-14 23:20:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:20:47,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-14 23:20:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:47,669 INFO L225 Difference]: With dead ends: 108 [2020-10-14 23:20:47,669 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 23:20:47,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:20:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 23:20:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-10-14 23:20:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:20:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-10-14 23:20:47,677 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 25 [2020-10-14 23:20:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:47,680 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-10-14 23:20:47,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-10-14 23:20:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:20:47,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:47,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:47,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:20:47,682 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:47,682 INFO L82 PathProgramCache]: Analyzing trace with hash 612433158, now seen corresponding path program 1 times [2020-10-14 23:20:47,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:47,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637986369] [2020-10-14 23:20:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:47,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:47,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:47,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:48,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:49,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:49,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:20:49,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:20:49,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1906 [2020-10-14 23:20:49,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:49,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:49,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:20:49,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:49,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:20:49,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:49,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:49,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:49,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:49,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:49,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:49,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:49,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:49,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637986369] [2020-10-14 23:20:49,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:49,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:20:49,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105285030] [2020-10-14 23:20:49,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:20:49,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:49,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:20:49,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:20:49,848 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 11 states. [2020-10-14 23:20:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:50,317 INFO L93 Difference]: Finished difference Result 107 states and 133 transitions. [2020-10-14 23:20:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:20:50,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-14 23:20:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:50,319 INFO L225 Difference]: With dead ends: 107 [2020-10-14 23:20:50,319 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 23:20:50,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:20:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 23:20:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2020-10-14 23:20:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:20:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-10-14 23:20:50,327 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 25 [2020-10-14 23:20:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:50,328 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-10-14 23:20:50,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:20:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-10-14 23:20:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:20:50,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:50,329 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:50,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:20:50,329 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash 896336636, now seen corresponding path program 2 times [2020-10-14 23:20:50,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:50,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892583181] [2020-10-14 23:20:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:50,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:50,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:50,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:51,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:51,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:20:51,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:51,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-14 23:20:51,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:51,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:20:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:20:51,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:51,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:51,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:51,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:51,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:51,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:51,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:51,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:51,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892583181] [2020-10-14 23:20:51,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:51,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:20:51,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105029318] [2020-10-14 23:20:51,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:20:51,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:20:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:20:51,605 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 12 states. [2020-10-14 23:20:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:52,266 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2020-10-14 23:20:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:20:52,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-14 23:20:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:52,268 INFO L225 Difference]: With dead ends: 120 [2020-10-14 23:20:52,268 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 23:20:52,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:20:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 23:20:52,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 84. [2020-10-14 23:20:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 23:20:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2020-10-14 23:20:52,277 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 25 [2020-10-14 23:20:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:52,278 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2020-10-14 23:20:52,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:20:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2020-10-14 23:20:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:20:52,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:52,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:52,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:20:52,279 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:52,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1141709194, now seen corresponding path program 1 times [2020-10-14 23:20:52,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:52,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339467367] [2020-10-14 23:20:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:52,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:52,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:20:52,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:20:52,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-14 23:20:52,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:52,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:52,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:20:52,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:52,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:20:52,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:52,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:52,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:52,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:52,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:52,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:52,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:52,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:52,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:52,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:52,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:20:52,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339467367] [2020-10-14 23:20:52,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:52,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:20:52,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009303644] [2020-10-14 23:20:52,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:20:52,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:52,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:20:52,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:20:52,590 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand 6 states. [2020-10-14 23:20:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:52,836 INFO L93 Difference]: Finished difference Result 100 states and 128 transitions. [2020-10-14 23:20:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:20:52,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-14 23:20:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:52,838 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:20:52,838 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 23:20:52,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 23:20:52,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-14 23:20:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 23:20:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-14 23:20:52,847 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 26 [2020-10-14 23:20:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:52,847 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-14 23:20:52,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:20:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-14 23:20:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:20:52,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:52,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:52,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:20:52,849 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1823685009, now seen corresponding path program 1 times [2020-10-14 23:20:52,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:52,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116347714] [2020-10-14 23:20:52,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:53,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:53,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:53,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:20:53,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:53,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-14 23:20:53,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:53,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:53,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:20:53,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:53,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:20:53,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:53,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:53,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:53,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:53,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:53,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:53,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:53,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:53,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:53,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:53,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:53,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:53,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:53,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116347714] [2020-10-14 23:20:53,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:53,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:20:53,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150034399] [2020-10-14 23:20:53,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:20:53,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:53,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:20:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:20:53,754 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 11 states. [2020-10-14 23:20:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:54,847 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2020-10-14 23:20:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:20:54,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-14 23:20:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:54,849 INFO L225 Difference]: With dead ends: 131 [2020-10-14 23:20:54,849 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 23:20:54,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:20:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 23:20:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-14 23:20:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:20:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-10-14 23:20:54,860 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 26 [2020-10-14 23:20:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:54,860 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-10-14 23:20:54,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:20:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-10-14 23:20:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:20:54,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:54,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:54,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:20:54,862 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:54,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:54,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1778925014, now seen corresponding path program 1 times [2020-10-14 23:20:54,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:54,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100350784] [2020-10-14 23:20:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:55,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:55,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:20:55,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:20:55,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-14 23:20:55,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:55,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:55,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:20:55,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:55,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:20:55,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:55,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:55,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:55,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:55,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:55,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:55,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:55,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:55,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100350784] [2020-10-14 23:20:55,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:55,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:20:55,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591484429] [2020-10-14 23:20:55,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:20:55,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:55,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:20:55,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:55,358 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 8 states. [2020-10-14 23:20:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:55,852 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2020-10-14 23:20:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:20:55,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 23:20:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:55,854 INFO L225 Difference]: With dead ends: 121 [2020-10-14 23:20:55,854 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 23:20:55,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:20:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 23:20:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 89. [2020-10-14 23:20:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 23:20:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-10-14 23:20:55,868 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 26 [2020-10-14 23:20:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:55,869 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-10-14 23:20:55,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:20:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-10-14 23:20:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:20:55,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:55,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:55,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:20:55,870 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash 969578388, now seen corresponding path program 1 times [2020-10-14 23:20:55,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:55,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55920655] [2020-10-14 23:20:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:55,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:56,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:56,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:20:56,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:20:56,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-14 23:20:56,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:56,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:56,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:20:56,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:56,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:20:56,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:56,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:56,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:56,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:56,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:56,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:56,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:56,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:56,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:56,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:20:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:56,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55920655] [2020-10-14 23:20:56,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:56,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:56,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530218304] [2020-10-14 23:20:56,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:56,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:56,711 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 10 states. [2020-10-14 23:20:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:57,299 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2020-10-14 23:20:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:20:57,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 23:20:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:57,301 INFO L225 Difference]: With dead ends: 118 [2020-10-14 23:20:57,301 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 23:20:57,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:20:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 23:20:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2020-10-14 23:20:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:20:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2020-10-14 23:20:57,311 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 26 [2020-10-14 23:20:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:57,311 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2020-10-14 23:20:57,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2020-10-14 23:20:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:20:57,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:57,312 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:57,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:20:57,312 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash -125746191, now seen corresponding path program 4 times [2020-10-14 23:20:57,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:57,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504751778] [2020-10-14 23:20:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:57,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:57,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:57,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:20:57,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:57,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-14 23:20:57,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:57,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:20:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:20:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:58,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:58,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:58,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:58,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:58,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:58,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:58,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:58,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:58,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504751778] [2020-10-14 23:20:58,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:58,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:20:58,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165943082] [2020-10-14 23:20:58,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:20:58,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:20:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:20:58,046 INFO L87 Difference]: Start difference. First operand 95 states and 122 transitions. Second operand 12 states. [2020-10-14 23:20:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:59,287 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2020-10-14 23:20:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:20:59,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-14 23:20:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:59,293 INFO L225 Difference]: With dead ends: 126 [2020-10-14 23:20:59,293 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 23:20:59,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:20:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 23:20:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-10-14 23:20:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:20:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2020-10-14 23:20:59,303 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 26 [2020-10-14 23:20:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:59,304 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2020-10-14 23:20:59,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:20:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2020-10-14 23:20:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:20:59,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:59,304 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:59,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:20:59,305 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1640873675, now seen corresponding path program 2 times [2020-10-14 23:20:59,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:59,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410450222] [2020-10-14 23:20:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:59,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:59,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:59,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:59,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:59,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:20:59,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:59,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-14 23:20:59,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:59,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:20:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:20:59,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:00,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:00,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:00,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:00,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:00,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:00,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:00,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:00,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:00,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:21:00,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410450222] [2020-10-14 23:21:00,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:00,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:21:00,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69158106] [2020-10-14 23:21:00,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:21:00,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:00,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:21:00,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:21:00,076 INFO L87 Difference]: Start difference. First operand 95 states and 122 transitions. Second operand 10 states. [2020-10-14 23:21:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:00,536 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2020-10-14 23:21:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:21:00,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 23:21:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:00,540 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:21:00,540 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:21:00,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:21:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:21:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2020-10-14 23:21:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:21:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-10-14 23:21:00,554 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 27 [2020-10-14 23:21:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:00,554 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-10-14 23:21:00,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:21:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-10-14 23:21:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:21:00,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:00,555 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:00,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:21:00,555 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1614443772, now seen corresponding path program 5 times [2020-10-14 23:21:00,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:00,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815776899] [2020-10-14 23:21:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:00,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:00,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:00,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:21:00,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:00,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-14 23:21:00,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:00,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:00,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:21:00,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:21:00,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:21:01,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:01,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:01,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:01,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:01,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:01,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:01,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:01,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:01,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:01,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:01,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:01,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:01,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815776899] [2020-10-14 23:21:01,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:01,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:21:01,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947012223] [2020-10-14 23:21:01,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:21:01,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:21:01,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:21:01,137 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 12 states. [2020-10-14 23:21:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:02,195 INFO L93 Difference]: Finished difference Result 115 states and 143 transitions. [2020-10-14 23:21:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:21:02,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-14 23:21:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:02,196 INFO L225 Difference]: With dead ends: 115 [2020-10-14 23:21:02,197 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 23:21:02,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:21:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 23:21:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2020-10-14 23:21:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 23:21:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2020-10-14 23:21:02,208 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 27 [2020-10-14 23:21:02,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:02,208 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2020-10-14 23:21:02,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:21:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2020-10-14 23:21:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:21:02,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:02,209 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:02,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:21:02,209 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:02,210 INFO L82 PathProgramCache]: Analyzing trace with hash -121887433, now seen corresponding path program 3 times [2020-10-14 23:21:02,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:02,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200453840] [2020-10-14 23:21:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:02,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:02,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:03,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:03,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:21:03,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:03,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1737 [2020-10-14 23:21:03,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:03,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:03,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:03,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:03,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:21:03,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:21:04,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:04,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:04,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:04,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:04,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:04,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:04,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:04,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:04,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:04,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:04,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:04,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:21:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:04,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200453840] [2020-10-14 23:21:04,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:04,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:04,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245822507] [2020-10-14 23:21:04,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:04,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:04,600 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand 13 states. [2020-10-14 23:21:06,103 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-14 23:21:06,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:06,310 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-10-14 23:21:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:21:06,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-14 23:21:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:06,312 INFO L225 Difference]: With dead ends: 119 [2020-10-14 23:21:06,312 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 23:21:06,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:21:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 23:21:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2020-10-14 23:21:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 23:21:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2020-10-14 23:21:06,324 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 27 [2020-10-14 23:21:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:06,324 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2020-10-14 23:21:06,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2020-10-14 23:21:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:21:06,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:06,325 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:06,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:21:06,325 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash -931234059, now seen corresponding path program 1 times [2020-10-14 23:21:06,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:06,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116058247] [2020-10-14 23:21:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:06,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:06,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:06,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:06,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:08,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:08,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:08,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:08,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:21:08,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:21:08,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2517 [2020-10-14 23:21:08,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:08,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:08,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:21:08,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:08,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:21:08,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:09,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:09,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:09,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:09,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:09,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:09,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:21:09,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:09,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:09,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:09,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:09,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116058247] [2020-10-14 23:21:09,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:09,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:21:09,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643508410] [2020-10-14 23:21:09,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:21:09,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:09,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:21:09,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:21:09,323 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand 12 states. [2020-10-14 23:21:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:10,512 INFO L93 Difference]: Finished difference Result 131 states and 164 transitions. [2020-10-14 23:21:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:21:10,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-14 23:21:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:10,514 INFO L225 Difference]: With dead ends: 131 [2020-10-14 23:21:10,514 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 23:21:10,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:21:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 23:21:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-14 23:21:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 23:21:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2020-10-14 23:21:10,526 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 27 [2020-10-14 23:21:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:10,526 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2020-10-14 23:21:10,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:21:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2020-10-14 23:21:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:21:10,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:10,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:10,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:21:10,527 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1260056025, now seen corresponding path program 1 times [2020-10-14 23:21:10,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:10,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581988680] [2020-10-14 23:21:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:10,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:10,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:21:10,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:10,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:10,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:10,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:10,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:10,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:10,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:21:10,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:10,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:10,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:10,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:10,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581988680] [2020-10-14 23:21:10,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:10,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:21:10,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766801959] [2020-10-14 23:21:10,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:21:10,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:10,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:21:10,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:21:10,818 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand 11 states. [2020-10-14 23:21:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:11,289 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2020-10-14 23:21:11,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:21:11,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 23:21:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:11,291 INFO L225 Difference]: With dead ends: 129 [2020-10-14 23:21:11,291 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 23:21:11,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 23:21:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2020-10-14 23:21:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 23:21:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 132 transitions. [2020-10-14 23:21:11,301 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 132 transitions. Word has length 28 [2020-10-14 23:21:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:11,301 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 132 transitions. [2020-10-14 23:21:11,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:21:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 132 transitions. [2020-10-14 23:21:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:21:11,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:11,302 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:11,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:21:11,302 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:11,302 INFO L82 PathProgramCache]: Analyzing trace with hash 971107220, now seen corresponding path program 2 times [2020-10-14 23:21:11,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:11,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83850840] [2020-10-14 23:21:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:11,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:11,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:11,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:12,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:12,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:21:12,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:12,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-14 23:21:12,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:12,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:12,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:12,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:12,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:21:12,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:12,529 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-14 23:21:12,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:12,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:12,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:12,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:12,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:12,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:12,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:12,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:12,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:12,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:12,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83850840] [2020-10-14 23:21:12,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:12,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:12,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168516338] [2020-10-14 23:21:12,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:12,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:12,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:12,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:12,720 INFO L87 Difference]: Start difference. First operand 104 states and 132 transitions. Second operand 13 states. [2020-10-14 23:21:13,669 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 23:21:13,937 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2020-10-14 23:21:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:14,404 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2020-10-14 23:21:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:21:14,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-14 23:21:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:14,406 INFO L225 Difference]: With dead ends: 131 [2020-10-14 23:21:14,406 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 23:21:14,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:21:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 23:21:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 106. [2020-10-14 23:21:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 23:21:14,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2020-10-14 23:21:14,420 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 28 [2020-10-14 23:21:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:14,420 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2020-10-14 23:21:14,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:14,421 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2020-10-14 23:21:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:21:14,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:14,421 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:14,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:21:14,422 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1672171798, now seen corresponding path program 1 times [2020-10-14 23:21:14,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:14,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615356490] [2020-10-14 23:21:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:14,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:14,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:14,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:14,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:15,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:15,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:21:15,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:16,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:16,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:16,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:16,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:16,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:16,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:16,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:16,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:16,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:16,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615356490] [2020-10-14 23:21:16,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:16,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:21:16,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630866910] [2020-10-14 23:21:16,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:21:16,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:21:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:21:16,075 INFO L87 Difference]: Start difference. First operand 106 states and 135 transitions. Second operand 12 states. [2020-10-14 23:21:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:16,881 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2020-10-14 23:21:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:21:16,881 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 23:21:16,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:16,883 INFO L225 Difference]: With dead ends: 135 [2020-10-14 23:21:16,883 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 23:21:16,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:21:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 23:21:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 106. [2020-10-14 23:21:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 23:21:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2020-10-14 23:21:16,894 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 28 [2020-10-14 23:21:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:16,894 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2020-10-14 23:21:16,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:21:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2020-10-14 23:21:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:21:16,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:16,895 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:16,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:21:16,895 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash 278749947, now seen corresponding path program 2 times [2020-10-14 23:21:16,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:16,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033149234] [2020-10-14 23:21:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:16,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:16,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:17,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:17,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:17,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:21:17,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:17,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-14 23:21:17,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:17,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:21:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:21:17,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:18,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:18,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:18,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:18,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:18,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:18,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:18,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:18,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:18,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:18,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:18,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:18,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:18,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033149234] [2020-10-14 23:21:18,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:18,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:21:18,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781573522] [2020-10-14 23:21:18,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:21:18,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:18,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:21:18,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:21:18,390 INFO L87 Difference]: Start difference. First operand 106 states and 135 transitions. Second operand 12 states. [2020-10-14 23:21:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:19,226 INFO L93 Difference]: Finished difference Result 136 states and 172 transitions. [2020-10-14 23:21:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:21:19,226 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 23:21:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:19,227 INFO L225 Difference]: With dead ends: 136 [2020-10-14 23:21:19,228 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 23:21:19,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:21:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 23:21:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2020-10-14 23:21:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 23:21:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2020-10-14 23:21:19,240 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 28 [2020-10-14 23:21:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:19,241 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2020-10-14 23:21:19,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:21:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2020-10-14 23:21:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:21:19,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:19,242 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:19,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:21:19,242 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash -320667167, now seen corresponding path program 3 times [2020-10-14 23:21:19,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:19,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056462586] [2020-10-14 23:21:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:19,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:19,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:19,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:20,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:20,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:21:20,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-14 23:21:20,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:20,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:21:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:21:20,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:20,541 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-14 23:21:20,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:20,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:20,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:20,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:20,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:20,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:20,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:20,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:20,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:20,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056462586] [2020-10-14 23:21:20,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:20,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:21:20,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436699516] [2020-10-14 23:21:20,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:21:20,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:21:20,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:21:20,815 INFO L87 Difference]: Start difference. First operand 106 states and 135 transitions. Second operand 15 states. [2020-10-14 23:21:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:22,346 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2020-10-14 23:21:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:21:22,346 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-14 23:21:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:22,348 INFO L225 Difference]: With dead ends: 133 [2020-10-14 23:21:22,348 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 23:21:22,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:21:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 23:21:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2020-10-14 23:21:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:21:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2020-10-14 23:21:22,359 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 29 [2020-10-14 23:21:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:22,359 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2020-10-14 23:21:22,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:21:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2020-10-14 23:21:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:21:22,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:22,361 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:22,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:21:22,361 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash -875230593, now seen corresponding path program 6 times [2020-10-14 23:21:22,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:22,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211950132] [2020-10-14 23:21:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:22,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:22,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:22,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:21:22,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:22,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-14 23:21:22,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:22,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:21:22,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:21:23,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:23,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:23,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:23,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:23,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:23,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:23,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:23,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:23,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:23,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211950132] [2020-10-14 23:21:23,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:23,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:23,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859523579] [2020-10-14 23:21:23,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:23,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:23,267 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand 13 states. [2020-10-14 23:21:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:25,009 INFO L93 Difference]: Finished difference Result 156 states and 197 transitions. [2020-10-14 23:21:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:21:25,010 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-14 23:21:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:25,011 INFO L225 Difference]: With dead ends: 156 [2020-10-14 23:21:25,011 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 23:21:25,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:21:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 23:21:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 103. [2020-10-14 23:21:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:21:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2020-10-14 23:21:25,025 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 29 [2020-10-14 23:21:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:25,025 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2020-10-14 23:21:25,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2020-10-14 23:21:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:21:25,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:25,026 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:25,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:21:25,026 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash -192020880, now seen corresponding path program 2 times [2020-10-14 23:21:25,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:25,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564484599] [2020-10-14 23:21:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:25,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:25,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:25,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:25,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:26,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:27,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:27,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:27,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:21:27,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:21:27,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2516 [2020-10-14 23:21:27,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:27,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:21:27,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:28,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:28,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:28,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:28,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:28,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:28,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:28,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:28,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:28,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:28,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564484599] [2020-10-14 23:21:28,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:28,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:28,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221509851] [2020-10-14 23:21:28,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:28,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:28,019 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand 13 states. [2020-10-14 23:21:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:29,054 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2020-10-14 23:21:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:21:29,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-14 23:21:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:29,055 INFO L225 Difference]: With dead ends: 134 [2020-10-14 23:21:29,056 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 23:21:29,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:21:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 23:21:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 95. [2020-10-14 23:21:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:21:29,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-10-14 23:21:29,074 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 29 [2020-10-14 23:21:29,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:29,075 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-10-14 23:21:29,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-10-14 23:21:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:21:29,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:29,076 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:29,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:21:29,077 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:29,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1236190942, now seen corresponding path program 2 times [2020-10-14 23:21:29,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:29,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781184546] [2020-10-14 23:21:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:29,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:29,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:29,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:21:29,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:29,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-14 23:21:29,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:29,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:29,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:21:29,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:29,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:21:29,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:21:29,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:29,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:29,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:29,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:29,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:29,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:21:29,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:29,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:29,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:29,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:29,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:29,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:29,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781184546] [2020-10-14 23:21:29,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:29,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:21:29,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499411688] [2020-10-14 23:21:29,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:21:29,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:21:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:21:29,515 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand 11 states. [2020-10-14 23:21:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:30,086 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-14 23:21:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:21:30,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 23:21:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:30,088 INFO L225 Difference]: With dead ends: 120 [2020-10-14 23:21:30,088 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 23:21:30,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:21:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 23:21:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-10-14 23:21:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 23:21:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2020-10-14 23:21:30,100 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 30 [2020-10-14 23:21:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:30,101 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2020-10-14 23:21:30,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:21:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2020-10-14 23:21:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:21:30,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:30,102 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:30,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:21:30,102 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash -832567668, now seen corresponding path program 7 times [2020-10-14 23:21:30,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:30,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552294942] [2020-10-14 23:21:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:30,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:30,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:21:30,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:30,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-14 23:21:30,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:30,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:30,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:21:30,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:30,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:21:30,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:30,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:30,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:30,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:30,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:30,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:30,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:30,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:30,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:30,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552294942] [2020-10-14 23:21:30,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:30,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:21:30,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839071391] [2020-10-14 23:21:30,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:21:30,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:30,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:21:30,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:21:30,597 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand 12 states. [2020-10-14 23:21:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:31,904 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-14 23:21:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:21:31,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 23:21:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:31,906 INFO L225 Difference]: With dead ends: 132 [2020-10-14 23:21:31,906 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 23:21:31,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:21:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 23:21:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2020-10-14 23:21:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 23:21:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-10-14 23:21:31,919 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 30 [2020-10-14 23:21:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:31,919 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-10-14 23:21:31,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:21:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-10-14 23:21:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:21:31,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:31,920 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:31,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:21:31,921 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1201112192, now seen corresponding path program 1 times [2020-10-14 23:21:31,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:31,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756633937] [2020-10-14 23:21:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:31,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:32,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:32,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:32,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:21:32,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:32,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-14 23:21:32,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:32,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:21:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:21:32,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:33,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:33,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:33,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:33,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:33,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:33,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:33,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:33,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:33,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756633937] [2020-10-14 23:21:33,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:33,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:21:33,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176836471] [2020-10-14 23:21:33,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:21:33,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:21:33,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:21:33,297 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 14 states. [2020-10-14 23:21:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:34,374 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2020-10-14 23:21:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:21:34,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-14 23:21:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:34,376 INFO L225 Difference]: With dead ends: 135 [2020-10-14 23:21:34,376 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 23:21:34,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:21:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 23:21:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2020-10-14 23:21:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:21:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-10-14 23:21:34,388 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 30 [2020-10-14 23:21:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:34,389 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-10-14 23:21:34,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:21:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-10-14 23:21:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:21:34,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:34,389 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:34,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:21:34,390 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:34,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1883088007, now seen corresponding path program 3 times [2020-10-14 23:21:34,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:34,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723164253] [2020-10-14 23:21:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:34,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:34,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:35,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:35,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:21:35,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:35,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1403 [2020-10-14 23:21:35,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:35,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:21:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:21:35,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:36,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:36,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:36,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:36,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:36,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:36,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:36,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:36,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:36,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:36,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:36,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:36,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:36,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723164253] [2020-10-14 23:21:36,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:36,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:21:36,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172443232] [2020-10-14 23:21:36,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:21:36,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:36,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:21:36,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:21:36,388 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 14 states. [2020-10-14 23:21:37,777 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-14 23:21:38,080 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-10-14 23:21:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:38,642 INFO L93 Difference]: Finished difference Result 154 states and 187 transitions. [2020-10-14 23:21:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:21:38,642 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-14 23:21:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:38,644 INFO L225 Difference]: With dead ends: 154 [2020-10-14 23:21:38,644 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 23:21:38,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:21:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 23:21:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 100. [2020-10-14 23:21:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 23:21:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2020-10-14 23:21:38,658 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 30 [2020-10-14 23:21:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:38,658 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2020-10-14 23:21:38,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:21:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2020-10-14 23:21:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:21:38,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:38,659 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:38,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:21:38,659 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:38,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1182023429, now seen corresponding path program 2 times [2020-10-14 23:21:38,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:38,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026162915] [2020-10-14 23:21:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:38,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:38,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:38,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:39,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:40,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:40,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:40,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:40,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:21:40,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:21:40,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2279 [2020-10-14 23:21:40,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:40,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:40,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:40,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:40,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:21:40,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:41,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:41,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:41,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:41,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:41,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:41,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:41,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:41,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:41,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026162915] [2020-10-14 23:21:41,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:41,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:41,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344199250] [2020-10-14 23:21:41,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:41,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:41,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:41,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:41,332 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand 13 states. [2020-10-14 23:21:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:42,362 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2020-10-14 23:21:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:21:42,363 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 23:21:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:42,364 INFO L225 Difference]: With dead ends: 142 [2020-10-14 23:21:42,365 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 23:21:42,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:21:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 23:21:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 98. [2020-10-14 23:21:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 23:21:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2020-10-14 23:21:42,382 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 30 [2020-10-14 23:21:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:42,383 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2020-10-14 23:21:42,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2020-10-14 23:21:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:21:42,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:42,384 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:42,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:21:42,384 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1719522016, now seen corresponding path program 4 times [2020-10-14 23:21:42,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:42,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705292507] [2020-10-14 23:21:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:42,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:42,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:44,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:44,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:21:44,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:44,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-14 23:21:44,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:44,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:44,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:44,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:44,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:21:44,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:44,077 ERROR L253 erpolLogProxyWrapper]: Interpolant 19 not inductive [2020-10-14 23:21:44,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:21:44,079 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:849) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-14 23:21:44,083 INFO L168 Benchmark]: Toolchain (without parser) took 73607.69 ms. Allocated memory was 147.8 MB in the beginning and 810.5 MB in the end (delta: 662.7 MB). Free memory was 102.9 MB in the beginning and 693.2 MB in the end (delta: -590.3 MB). Peak memory consumption was 657.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:21:44,084 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 23:21:44,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 603.90 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.5 MB in the beginning and 172.0 MB in the end (delta: -69.5 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-10-14 23:21:44,085 INFO L168 Benchmark]: Boogie Preprocessor took 78.89 ms. Allocated memory is still 204.5 MB. Free memory was 172.0 MB in the beginning and 167.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-10-14 23:21:44,085 INFO L168 Benchmark]: RCFGBuilder took 670.51 ms. Allocated memory is still 204.5 MB. Free memory was 167.9 MB in the beginning and 121.0 MB in the end (delta: 46.9 MB). Peak memory consumption was 46.9 MB. Max. memory is 7.1 GB. [2020-10-14 23:21:44,085 INFO L168 Benchmark]: TraceAbstraction took 72249.47 ms. Allocated memory was 204.5 MB in the beginning and 810.5 MB in the end (delta: 606.1 MB). Free memory was 121.0 MB in the beginning and 693.2 MB in the end (delta: -572.2 MB). Peak memory consumption was 618.8 MB. Max. memory is 7.1 GB. [2020-10-14 23:21:44,088 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 603.90 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.5 MB in the beginning and 172.0 MB in the end (delta: -69.5 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 78.89 ms. Allocated memory is still 204.5 MB. Free memory was 172.0 MB in the beginning and 167.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 670.51 ms. Allocated memory is still 204.5 MB. Free memory was 167.9 MB in the beginning and 121.0 MB in the end (delta: 46.9 MB). Peak memory consumption was 46.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 72249.47 ms. Allocated memory was 204.5 MB in the beginning and 810.5 MB in the end (delta: 606.1 MB). Free memory was 121.0 MB in the beginning and 693.2 MB in the end (delta: -572.2 MB). Peak memory consumption was 618.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...