/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/list-ext3-properties/sll_circular_traversal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:32:05,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:32:05,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:32:05,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:32:05,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:32:05,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:32:05,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:32:05,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:32:05,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:32:05,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:32:05,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:32:05,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:32:05,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:32:05,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:32:05,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:32:05,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:32:05,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:32:05,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:32:05,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:32:05,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:32:05,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:32:05,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:32:05,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:32:05,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:32:05,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:32:05,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:32:05,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:32:05,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:32:05,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:32:05,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:32:05,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:32:05,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:32:05,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:32:05,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:32:05,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:32:05,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:32:05,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:32:05,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:32:05,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:32:05,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:32:05,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:32:05,201 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 23:32:05,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:32:05,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:32:05,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:32:05,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:32:05,239 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:32:05,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:32:05,240 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:32:05,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:32:05,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:32:05,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:32:05,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:32:05,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:32:05,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:32:05,243 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:32:05,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:32:05,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:32:05,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:32:05,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:32:05,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:32:05,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:32:05,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:32:05,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:32:05,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:32:05,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:32:05,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:32:05,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:32:05,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:32:05,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:32:05,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:32:05,247 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 23:32:05,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:32:05,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:32:05,585 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:32:05,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:32:05,590 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:32:05,591 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_circular_traversal-1.i [2020-10-14 23:32:05,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/948eecb7e/727fa0221a23489092f2c50f196cbf11/FLAGaea485e46 [2020-10-14 23:32:06,142 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:32:06,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_circular_traversal-1.i [2020-10-14 23:32:06,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/948eecb7e/727fa0221a23489092f2c50f196cbf11/FLAGaea485e46 [2020-10-14 23:32:06,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/948eecb7e/727fa0221a23489092f2c50f196cbf11 [2020-10-14 23:32:06,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:32:06,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:32:06,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:32:06,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:32:06,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:32:06,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:32:06" (1/1) ... [2020-10-14 23:32:06,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40abc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:06, skipping insertion in model container [2020-10-14 23:32:06,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:32:06" (1/1) ... [2020-10-14 23:32:06,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:32:06,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:32:06,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:32:06,994 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:32:07,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:32:07,119 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:32:07,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07 WrapperNode [2020-10-14 23:32:07,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:32:07,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:32:07,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:32:07,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:32:07,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (1/1) ... [2020-10-14 23:32:07,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (1/1) ... [2020-10-14 23:32:07,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (1/1) ... [2020-10-14 23:32:07,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (1/1) ... [2020-10-14 23:32:07,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (1/1) ... [2020-10-14 23:32:07,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (1/1) ... [2020-10-14 23:32:07,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (1/1) ... [2020-10-14 23:32:07,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:32:07,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:32:07,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:32:07,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:32:07,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (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 23:32:07,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:32:07,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:32:07,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:32:07,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:32:07,245 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 23:32:07,245 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2020-10-14 23:32:07,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:32:07,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:32:07,245 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:32:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:32:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:32:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:32:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:32:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:32:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:32:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:32:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:32:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:32:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:32:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:32:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:32:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:32:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:32:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:32:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:32:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:32:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:32:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:32:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:32:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:32:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:32:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:32:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:32:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:32:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:32:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:32:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:32:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:32:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:32:07,250 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:32:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:32:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:32:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:32:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:32:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:32:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:32:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:32:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:32:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:32:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:32:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:32:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:32:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:32:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:32:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:32:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:32:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:32:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:32:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:32:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:32:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:32:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:32:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:32:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:32:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:32:07,254 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:32:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:32:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:32:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:32:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:32:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:32:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:32:07,255 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:32:07,256 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:32:07,256 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:32:07,256 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:32:07,256 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:32:07,256 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:32:07,256 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:32:07,256 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:32:07,257 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:32:07,257 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:32:07,257 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:32:07,257 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:32:07,257 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:32:07,257 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:32:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:32:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:32:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:32:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:32:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:32:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:32:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:32:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:32:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:32:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:32:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:32:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:32:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:32:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:32:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:32:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:32:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:32:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:32:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:32:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:32:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:32:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:32:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:32:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:32:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:32:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:32:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:32:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 23:32:07,262 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2020-10-14 23:32:07,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:32:07,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:32:07,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:32:07,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:32:07,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:32:07,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:32:07,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:32:07,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:32:07,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:32:07,575 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 23:32:07,762 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:32:07,763 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 23:32:07,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:32:07 BoogieIcfgContainer [2020-10-14 23:32:07,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:32:07,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:32:07,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:32:07,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:32:07,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:32:06" (1/3) ... [2020-10-14 23:32:07,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f88c150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:32:07, skipping insertion in model container [2020-10-14 23:32:07,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:07" (2/3) ... [2020-10-14 23:32:07,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f88c150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:32:07, skipping insertion in model container [2020-10-14 23:32:07,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:32:07" (3/3) ... [2020-10-14 23:32:07,776 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_circular_traversal-1.i [2020-10-14 23:32:07,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:32:07,795 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:32:07,809 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:32:07,837 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:32:07,837 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:32:07,837 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:32:07,838 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:32:07,838 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:32:07,838 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:32:07,838 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:32:07,838 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:32:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-14 23:32:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:32:07,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:07,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:07,866 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1699825484, now seen corresponding path program 1 times [2020-10-14 23:32:07,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:07,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060727212] [2020-10-14 23:32:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:08,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:08,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:08,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:08,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:32:08,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:08,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-14 23:32:08,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:08,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:32:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:32:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:32:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:32:08,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:08,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:08,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:08,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:08,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:08,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 23:32:08,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:08,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:08,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:08,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:08,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:08,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:08,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:08,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 23:32:08,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:08,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-14 23:32:08,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:08,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:08,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:32:08,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:08,825 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 23:32:08,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060727212] [2020-10-14 23:32:08,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:32:08,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-14 23:32:08,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961525908] [2020-10-14 23:32:08,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:32:08,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:32:08,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:32:08,852 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 10 states. [2020-10-14 23:32:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:09,175 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2020-10-14 23:32:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:32:09,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 23:32:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:09,187 INFO L225 Difference]: With dead ends: 67 [2020-10-14 23:32:09,187 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:32:09,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:32:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:32:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-14 23:32:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:32:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 23:32:09,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 18 [2020-10-14 23:32:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:09,239 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 23:32:09,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:32:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 23:32:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:32:09,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:09,241 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] [2020-10-14 23:32:09,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:32:09,241 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:09,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1747055625, now seen corresponding path program 1 times [2020-10-14 23:32:09,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:09,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210004518] [2020-10-14 23:32:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:09,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:09,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:10,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:10,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:32:10,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-10-14 23:32:10,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:10,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:32:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:32:10,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:10,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:10,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:10,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:10,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:10,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:10,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:10,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:10,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:10,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:10,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:10,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:10,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 23:32:10,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:10,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-14 23:32:10,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:10,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:32:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:32:10,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:10,303 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 23:32:10,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210004518] [2020-10-14 23:32:10,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:10,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:32:10,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628988065] [2020-10-14 23:32:10,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:32:10,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:10,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:32:10,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:32:10,308 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 11 states. [2020-10-14 23:32:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:10,633 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-14 23:32:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:32:10,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-14 23:32:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:10,635 INFO L225 Difference]: With dead ends: 49 [2020-10-14 23:32:10,635 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 23:32:10,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:32:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 23:32:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-10-14 23:32:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:32:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-14 23:32:10,645 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2020-10-14 23:32:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:10,646 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-14 23:32:10,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:32:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-14 23:32:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:32:10,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:10,647 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 23:32:10,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:32:10,648 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash 344918701, now seen corresponding path program 1 times [2020-10-14 23:32:10,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:10,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718884023] [2020-10-14 23:32:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:10,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:10,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:10,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:32:10,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:10,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 23:32:10,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:10,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:10,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:32:10,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:32:10,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:32:10,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:11,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:11,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:11,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:11,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:11,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:11,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:11,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:11,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:11,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:11,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:11,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 23:32:11,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:11,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-14 23:32:11,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:11,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:32:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:11,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:32:11,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:11,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718884023] [2020-10-14 23:32:11,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:11,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:32:11,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415025711] [2020-10-14 23:32:11,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:32:11,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:11,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:32:11,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:32:11,436 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 11 states. [2020-10-14 23:32:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:11,949 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-14 23:32:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:32:11,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-14 23:32:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:11,951 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:32:11,951 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:32:11,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:32:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:32:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-14 23:32:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:32:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-14 23:32:11,975 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2020-10-14 23:32:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:11,976 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-14 23:32:11,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:32:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-14 23:32:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:32:11,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:11,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:11,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:32:11,980 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1674465109, now seen corresponding path program 1 times [2020-10-14 23:32:11,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:11,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652114326] [2020-10-14 23:32:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:12,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:12,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:12,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:32:12,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:12,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-14 23:32:12,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:12,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:32:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:12,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:32:12,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:32:12,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:12,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:12,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:12,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:12,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:12,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:32:12,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:12,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:12,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:12,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:32:12,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:12,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:12,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:12,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 23:32:12,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:12,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-14 23:32:12,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:12,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:12,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:32:12,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 23:32:12,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:32:12,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:12,320 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 23:32:12,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652114326] [2020-10-14 23:32:12,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:32:12,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:32:12,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014540004] [2020-10-14 23:32:12,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:32:12,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:12,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:32:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:32:12,323 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-10-14 23:32:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:12,512 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-14 23:32:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:32:12,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 23:32:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:12,514 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:32:12,514 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:32:12,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:32:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:32:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-14 23:32:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:32:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 23:32:12,521 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-14 23:32:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:12,521 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 23:32:12,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:32:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 23:32:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:32:12,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:12,523 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 23:32:12,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:32:12,524 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1912188010, now seen corresponding path program 1 times [2020-10-14 23:32:12,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:12,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500974727] [2020-10-14 23:32:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:12,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:12,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:12,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:13,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:13,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:32:13,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:13,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-14 23:32:13,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:13,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:13,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:32:13,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:13,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:32:13,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:13,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:13,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:13,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:13,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:13,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:13,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:13,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:13,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:13,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:13,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:13,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:13,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:13,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 23:32:13,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:13,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-14 23:32:13,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:13,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:13,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:32:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:32:13,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:13,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500974727] [2020-10-14 23:32:13,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:13,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:32:13,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989716429] [2020-10-14 23:32:13,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:32:13,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:32:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:32:13,566 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 14 states. [2020-10-14 23:32:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:14,114 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-14 23:32:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:32:14,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-14 23:32:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:14,118 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:32:14,121 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:32:14,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:32:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:32:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-14 23:32:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:32:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 23:32:14,136 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 24 [2020-10-14 23:32:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:14,137 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 23:32:14,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:32:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 23:32:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:32:14,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:14,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:14,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:32:14,140 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash -853099198, now seen corresponding path program 1 times [2020-10-14 23:32:14,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:14,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584471404] [2020-10-14 23:32:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:14,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:14,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:14,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:14,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:32:14,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:14,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-14 23:32:14,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:14,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:14,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:32:14,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:14,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:32:14,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:14,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:14,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:14,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:14,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:14,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:14,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:14,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:14,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:14,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:14,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:14,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:14,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:14,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 23:32:14,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:14,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-14 23:32:14,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:14,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:32:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:32:14,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:14,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584471404] [2020-10-14 23:32:14,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:14,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:32:14,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493528949] [2020-10-14 23:32:14,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:32:14,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:14,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:32:14,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:32:14,958 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2020-10-14 23:32:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:15,233 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-14 23:32:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:32:15,234 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-14 23:32:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:15,235 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:32:15,235 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 23:32:15,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:32:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 23:32:15,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-14 23:32:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:32:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-14 23:32:15,267 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 25 [2020-10-14 23:32:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:15,268 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-14 23:32:15,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:32:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-14 23:32:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:32:15,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:15,269 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 23:32:15,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:32:15,269 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1842697613, now seen corresponding path program 2 times [2020-10-14 23:32:15,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:15,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940483081] [2020-10-14 23:32:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:15,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:15,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:15,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:16,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:16,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:32:16,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:16,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-14 23:32:16,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:16,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:32:16,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:16,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:32:16,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:16,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:16,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:16,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:16,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:16,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:16,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:16,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:16,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:16,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:16,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:16,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:16,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:16,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:16,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:16,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 23:32:16,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-14 23:32:16,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:16,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:32:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:32:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:16,525 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 23:32:16,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940483081] [2020-10-14 23:32:16,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:16,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:32:16,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141907235] [2020-10-14 23:32:16,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:32:16,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:16,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:32:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:32:16,528 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 15 states. [2020-10-14 23:32:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:17,032 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-14 23:32:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:32:17,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-14 23:32:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:17,033 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:32:17,034 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 23:32:17,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:32:17,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 23:32:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-14 23:32:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:32:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-14 23:32:17,041 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 27 [2020-10-14 23:32:17,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:17,042 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-14 23:32:17,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:32:17,042 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-14 23:32:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:32:17,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:17,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:17,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:32:17,044 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:17,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:17,044 INFO L82 PathProgramCache]: Analyzing trace with hash -420588777, now seen corresponding path program 3 times [2020-10-14 23:32:17,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:17,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824027913] [2020-10-14 23:32:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:17,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:17,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:17,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:17,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:32:17,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:17,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-14 23:32:17,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:17,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:17,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:32:17,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:17,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:32:17,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:17,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:17,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:17,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:17,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:17,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:17,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:32:17,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:17,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:17,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:17,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:32:17,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:18,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:18,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:32:18,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:18,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-14 23:32:18,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:18,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:18,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:32:18,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:18,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:32:18,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:18,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824027913] [2020-10-14 23:32:18,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:18,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:32:18,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546456792] [2020-10-14 23:32:18,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:32:18,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:32:18,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:32:18,483 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 15 states. [2020-10-14 23:32:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:19,353 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-14 23:32:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:32:19,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-14 23:32:19,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:19,359 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:32:19,359 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:32:19,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:32:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:32:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-10-14 23:32:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:32:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-14 23:32:19,366 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 27 [2020-10-14 23:32:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:19,367 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-14 23:32:19,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:32:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-14 23:32:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:32:19,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:19,368 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, 1, 1] [2020-10-14 23:32:19,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:32:19,368 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1287665791, now seen corresponding path program 1 times [2020-10-14 23:32:19,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:19,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927400626] [2020-10-14 23:32:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:19,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:19,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:20,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:20,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:32:20,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:20,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-14 23:32:20,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:20,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:32:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:32:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:32:20,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:20,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:20,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:20,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:20,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:20,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:20,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:20,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:20,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:20,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:20,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:20,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:20,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:20,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 23:32:20,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:20,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 23:32:20,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:20,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:32:20,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:20,587 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 23:32:20,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927400626] [2020-10-14 23:32:20,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:20,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:32:20,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888473989] [2020-10-14 23:32:20,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:32:20,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:20,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:32:20,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:32:20,590 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 16 states. [2020-10-14 23:32:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:21,094 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-10-14 23:32:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:32:21,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-10-14 23:32:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:21,096 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:32:21,096 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 23:32:21,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:32:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 23:32:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-14 23:32:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:32:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-14 23:32:21,113 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-10-14 23:32:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:21,113 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-14 23:32:21,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:32:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-14 23:32:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:32:21,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:21,114 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 23:32:21,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:32:21,115 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash -154735563, now seen corresponding path program 2 times [2020-10-14 23:32:21,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:21,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120350741] [2020-10-14 23:32:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:21,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:21,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:21,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:21,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:32:21,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:21,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-14 23:32:21,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:21,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:21,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:21,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:32:21,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:21,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:21,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:21,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:21,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:21,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:21,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:21,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:21,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:21,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:21,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:21,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:21,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:32:21,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:21,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-14 23:32:21,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:21,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:21,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:21,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 23:32:21,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:32:21,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:21,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120350741] [2020-10-14 23:32:21,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:21,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:32:21,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982658604] [2020-10-14 23:32:21,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:32:21,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:21,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:32:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:32:21,860 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 9 states. [2020-10-14 23:32:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:22,010 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-14 23:32:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:32:22,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-14 23:32:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:22,012 INFO L225 Difference]: With dead ends: 75 [2020-10-14 23:32:22,012 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:32:22,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:32:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:32:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-14 23:32:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 23:32:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-14 23:32:22,018 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 28 [2020-10-14 23:32:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:22,019 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-14 23:32:22,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:32:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-14 23:32:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:32:22,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:22,020 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:22,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:32:22,021 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash -25267102, now seen corresponding path program 3 times [2020-10-14 23:32:22,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:22,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066566510] [2020-10-14 23:32:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:22,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:32:23,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1063 [2020-10-14 23:32:23,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:32:23,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:23,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:32:23,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:23,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:23,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:23,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:32:23,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-14 23:32:23,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:32:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 23:32:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:32:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,328 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 23:32:23,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066566510] [2020-10-14 23:32:23,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:23,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:32:23,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068621106] [2020-10-14 23:32:23,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:32:23,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:23,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:32:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:32:23,331 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 10 states. [2020-10-14 23:32:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:23,479 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-14 23:32:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:32:23,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-14 23:32:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:23,480 INFO L225 Difference]: With dead ends: 63 [2020-10-14 23:32:23,480 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:32:23,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:32:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:32:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 23:32:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:32:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-14 23:32:23,491 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 31 [2020-10-14 23:32:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:23,492 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-14 23:32:23,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:32:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-14 23:32:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:32:23,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:23,497 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:23,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:32:23,498 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash 89022741, now seen corresponding path program 4 times [2020-10-14 23:32:23,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:23,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674481390] [2020-10-14 23:32:23,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:32:23,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-14 23:32:23,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:32:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:32:23,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:23,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:23,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:23,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:24,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:32:24,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:24,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-14 23:32:24,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:24,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:24,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:32:24,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:24,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:32:24,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 23:32:24,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674481390] [2020-10-14 23:32:24,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:24,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:32:24,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932461350] [2020-10-14 23:32:24,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:32:24,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:24,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:32:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:32:24,302 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 13 states. [2020-10-14 23:32:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:24,563 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-14 23:32:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:32:24,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 23:32:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:24,564 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:32:24,565 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:32:24,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:32:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:32:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 23:32:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:32:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-14 23:32:24,571 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-14 23:32:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:24,572 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-14 23:32:24,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:32:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-14 23:32:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:32:24,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:24,573 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:24,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:32:24,573 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:24,573 INFO L82 PathProgramCache]: Analyzing trace with hash 983781536, now seen corresponding path program 4 times [2020-10-14 23:32:24,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:24,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835247123] [2020-10-14 23:32:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:24,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:29,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:29,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:29,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:32:29,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:32:29,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-14 23:32:29,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:29,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:29,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:32:29,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:32:29,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:32:29,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:29,932 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-10-14 23:32:30,282 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-14 23:32:30,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:30,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:30,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:30,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:30,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:30,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:30,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:30,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:30,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:30,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:30,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:30,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:30,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:30,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:32:30,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:30,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-14 23:32:30,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:30,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:32:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:32:30,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:32:31,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835247123] [2020-10-14 23:32:31,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:31,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:32:31,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058727467] [2020-10-14 23:32:31,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:32:31,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:32:31,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:32:31,655 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 18 states. [2020-10-14 23:32:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:32,780 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-14 23:32:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:32:32,780 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-14 23:32:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:32,781 INFO L225 Difference]: With dead ends: 55 [2020-10-14 23:32:32,781 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:32:32,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:32:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:32:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-10-14 23:32:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:32:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-14 23:32:32,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 36 [2020-10-14 23:32:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:32,794 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-14 23:32:32,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:32:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-14 23:32:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 23:32:32,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:32,795 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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 23:32:32,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:32:32,795 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash 431071180, now seen corresponding path program 2 times [2020-10-14 23:32:32,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:32,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682422980] [2020-10-14 23:32:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:32,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:33,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:33,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:32:33,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:33,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-14 23:32:33,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:33,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:33,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:32:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:32:33,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:33,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:33,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:33,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:33,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:33,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:33,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:33,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:33,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:33,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:33,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:33,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:33,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:33,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:33,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:33,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:33,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:32:33,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:33,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-14 23:32:33,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:33,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:33,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:32:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:32:33,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:32:33,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682422980] [2020-10-14 23:32:33,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:33,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:32:33,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89049061] [2020-10-14 23:32:33,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:32:33,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:32:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:32:33,982 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 16 states. [2020-10-14 23:32:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:34,745 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-14 23:32:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:32:34,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-14 23:32:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:34,747 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:32:34,747 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:32:34,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:32:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:32:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 23:32:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:32:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-14 23:32:34,755 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-10-14 23:32:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:34,755 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-14 23:32:34,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:32:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-14 23:32:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:32:34,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:34,756 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:34,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:32:34,757 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:34,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1020150377, now seen corresponding path program 5 times [2020-10-14 23:32:34,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:34,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36788382] [2020-10-14 23:32:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:35,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:36,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:36,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 23:32:36,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:32:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2206 [2020-10-14 23:32:36,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:36,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:32:36,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:36,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:32:36,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:37,161 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-14 23:32:37,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:37,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:37,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:37,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:37,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:37,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:37,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:37,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:37,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:37,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:37,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:37,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:32:37,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:37,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-14 23:32:37,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:37,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:37,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:32:37,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:37,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:32:37,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:38,338 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-14 23:32:38,580 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-14 23:32:38,909 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 51 [2020-10-14 23:32:39,315 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 53 [2020-10-14 23:32:39,500 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-10-14 23:32:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:39,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36788382] [2020-10-14 23:32:39,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:39,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:32:39,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135738375] [2020-10-14 23:32:39,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:32:39,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:39,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:32:39,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:32:39,528 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 21 states. [2020-10-14 23:32:40,293 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-14 23:32:40,539 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2020-10-14 23:32:40,854 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 81 [2020-10-14 23:32:41,224 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 91 [2020-10-14 23:32:41,630 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 111 [2020-10-14 23:32:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:42,085 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-14 23:32:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:32:42,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-14 23:32:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:42,087 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:32:42,087 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:32:42,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:32:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:32:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-14 23:32:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:32:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-14 23:32:42,094 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 39 [2020-10-14 23:32:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:42,095 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-14 23:32:42,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:32:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-14 23:32:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:32:42,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:42,096 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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 23:32:42,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:32:42,097 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1561275979, now seen corresponding path program 3 times [2020-10-14 23:32:42,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:42,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124237497] [2020-10-14 23:32:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:42,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:42,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:42,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:32:42,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:42,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-14 23:32:42,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:42,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:42,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:32:42,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:42,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:32:42,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:43,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:43,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:43,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:43,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:43,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:43,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:43,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:43,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:43,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:43,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:43,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:43,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:43,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:32:43,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:43,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 23:32:43,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:43,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:43,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:32:43,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:43,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:32:43,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:43,683 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-14 23:32:43,825 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-14 23:32:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:44,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124237497] [2020-10-14 23:32:44,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:44,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:32:44,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479324706] [2020-10-14 23:32:44,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:32:44,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:44,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:32:44,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:32:44,018 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 19 states. [2020-10-14 23:32:44,317 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-14 23:32:44,824 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-14 23:32:45,167 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-14 23:32:45,378 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-14 23:32:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:45,575 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-14 23:32:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:32:45,576 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-14 23:32:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:45,577 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:32:45,577 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:32:45,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:32:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:32:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 23:32:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:32:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-14 23:32:45,588 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-14 23:32:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:45,588 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-14 23:32:45,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:32:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-14 23:32:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:32:45,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:45,590 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:45,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:32:45,590 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -110356160, now seen corresponding path program 6 times [2020-10-14 23:32:45,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:45,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857090205] [2020-10-14 23:32:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:45,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:46,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:50,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:50,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:32:50,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:32:50,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 23:32:50,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:50,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:32:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:32:50,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:51,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:51,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:51,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:51,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:51,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:51,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:51,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:51,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:51,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:51,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:51,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:51,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:51,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:51,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:51,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:51,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:32:51,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:51,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-14 23:32:51,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:51,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:51,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:32:51,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:51,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:32:51,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:52,436 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-14 23:32:52,632 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-14 23:32:52,899 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-10-14 23:32:53,167 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-14 23:32:53,342 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-14 23:32:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:53,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857090205] [2020-10-14 23:32:53,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:53,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:32:53,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875433920] [2020-10-14 23:32:53,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:32:53,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:32:53,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:32:53,368 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 23 states. [2020-10-14 23:32:53,837 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 23:32:54,219 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-14 23:32:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:54,694 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-10-14 23:32:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:32:54,695 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-14 23:32:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:54,696 INFO L225 Difference]: With dead ends: 81 [2020-10-14 23:32:54,696 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 23:32:54,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:32:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 23:32:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-14 23:32:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 23:32:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-14 23:32:54,706 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 42 [2020-10-14 23:32:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:54,706 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-14 23:32:54,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:32:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-14 23:32:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 23:32:54,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:54,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 23:32:54,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:32:54,708 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:54,708 INFO L82 PathProgramCache]: Analyzing trace with hash 872540972, now seen corresponding path program 4 times [2020-10-14 23:32:54,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:54,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717144008] [2020-10-14 23:32:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:54,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:55,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:55,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:32:55,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:55,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-14 23:32:55,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:55,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:32:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:32:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:32:55,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:55,871 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-14 23:32:56,020 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-14 23:32:56,162 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-14 23:32:56,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:56,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:56,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:56,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:56,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:56,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:56,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:56,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:56,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:56,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:32:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:56,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:56,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:56,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:32:56,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:56,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-14 23:32:56,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:56,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:56,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:32:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:32:56,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:57,144 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-14 23:32:57,348 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-14 23:32:57,585 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 46 [2020-10-14 23:32:57,885 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 40 [2020-10-14 23:32:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:58,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717144008] [2020-10-14 23:32:58,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:58,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:32:58,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944037562] [2020-10-14 23:32:58,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:32:58,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:32:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:32:58,052 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 21 states. [2020-10-14 23:32:58,812 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-14 23:32:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:59,473 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-10-14 23:32:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:32:59,473 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-14 23:32:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:59,474 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:32:59,474 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:32:59,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:32:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:32:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-10-14 23:32:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:32:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-14 23:32:59,484 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 43 [2020-10-14 23:32:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:59,485 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-14 23:32:59,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:32:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-14 23:32:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:32:59,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:59,486 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:59,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:32:59,487 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1969442569, now seen corresponding path program 7 times [2020-10-14 23:32:59,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:59,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146808931] [2020-10-14 23:32:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:59,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:01,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:01,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:33:01,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:33:01,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2172 [2020-10-14 23:33:01,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:01,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:33:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:33:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:33:01,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:01,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:01,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:01,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:01,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:01,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:01,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:01,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:01,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:01,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:01,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:01,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:01,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:02,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:33:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:02,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:02,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:02,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:33:02,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:02,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-14 23:33:02,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:02,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:33:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:33:02,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:03,138 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-14 23:33:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:03,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146808931] [2020-10-14 23:33:03,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:03,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:33:03,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308065629] [2020-10-14 23:33:03,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:33:03,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:03,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:33:03,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:33:03,301 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 22 states. [2020-10-14 23:33:03,989 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-14 23:33:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:04,432 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-10-14 23:33:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:33:04,432 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-14 23:33:04,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:04,433 INFO L225 Difference]: With dead ends: 90 [2020-10-14 23:33:04,434 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 23:33:04,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:33:04,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 23:33:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-10-14 23:33:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 23:33:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-14 23:33:04,442 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 45 [2020-10-14 23:33:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:04,443 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-14 23:33:04,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:33:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-14 23:33:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:33:04,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:04,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:04,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:33:04,444 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:04,444 INFO L82 PathProgramCache]: Analyzing trace with hash 283594413, now seen corresponding path program 8 times [2020-10-14 23:33:04,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:04,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416167936] [2020-10-14 23:33:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:04,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:05,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:06,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:07,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:09,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:09,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:33:09,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:33:09,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:33:09,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:09,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:33:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:33:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:33:09,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:09,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:09,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:09,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:09,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:09,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:09,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:09,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:09,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:09,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:09,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:09,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:09,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:09,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:33:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:09,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:10,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:10,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:33:10,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-14 23:33:10,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:10,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:33:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:33:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:10,979 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-14 23:33:11,236 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-14 23:33:11,576 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2020-10-14 23:33:12,027 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 62 [2020-10-14 23:33:12,479 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 61 [2020-10-14 23:33:12,746 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-14 23:33:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:12,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416167936] [2020-10-14 23:33:12,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:12,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:33:12,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977860694] [2020-10-14 23:33:12,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:33:12,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:12,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:33:12,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:33:12,776 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 23 states. [2020-10-14 23:33:13,499 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-14 23:33:13,701 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-14 23:33:13,979 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-14 23:33:14,283 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 87 [2020-10-14 23:33:14,718 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 98 [2020-10-14 23:33:15,265 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 106 [2020-10-14 23:33:15,951 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 139 [2020-10-14 23:33:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:16,558 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2020-10-14 23:33:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:33:16,559 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-10-14 23:33:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:16,560 INFO L225 Difference]: With dead ends: 88 [2020-10-14 23:33:16,560 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:33:16,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:33:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:33:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2020-10-14 23:33:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:33:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2020-10-14 23:33:16,572 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 45 [2020-10-14 23:33:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:16,572 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2020-10-14 23:33:16,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:33:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2020-10-14 23:33:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:33:16,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:16,573 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:16,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:33:16,573 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash -924562859, now seen corresponding path program 5 times [2020-10-14 23:33:16,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:16,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745198066] [2020-10-14 23:33:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:16,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:18,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:18,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:19,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:19,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:20,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:21,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:21,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:21,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:33:21,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:33:21,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5304 [2020-10-14 23:33:21,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:21,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:21,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:33:21,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:21,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:33:21,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:22,184 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-14 23:33:22,318 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-14 23:33:22,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:22,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:22,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:22,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:22,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:22,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:22,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:22,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:22,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:22,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:22,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:22,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:22,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:33:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:22,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:22,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:23,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:23,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:33:23,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:33:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-14 23:33:23,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:23,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:33:23,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:23,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:33:23,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:24,151 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-14 23:33:24,316 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-14 23:33:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:24,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745198066] [2020-10-14 23:33:24,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:24,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:33:24,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701003973] [2020-10-14 23:33:24,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:33:24,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:24,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:33:24,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:33:24,625 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 25 states. [2020-10-14 23:33:25,553 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-14 23:33:26,098 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-14 23:33:26,370 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-14 23:33:26,693 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-14 23:33:27,050 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-10-14 23:33:27,403 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-14 23:33:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:27,731 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-10-14 23:33:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:33:27,731 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-14 23:33:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:27,732 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:33:27,732 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 23:33:27,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:33:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 23:33:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-14 23:33:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 23:33:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-10-14 23:33:27,741 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 46 [2020-10-14 23:33:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:27,741 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-10-14 23:33:27,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:33:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-10-14 23:33:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:33:27,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:27,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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 23:33:27,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:33:27,742 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash 200106847, now seen corresponding path program 6 times [2020-10-14 23:33:27,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:27,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21463534] [2020-10-14 23:33:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:27,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:28,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:29,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1981 [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:33:29,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:29,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:29,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:29,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:29,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:29,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:29,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:29,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:29,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:29,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:29,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:29,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:29,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:29,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:33:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:30,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:30,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:33:30,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:30,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-14 23:33:30,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:30,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:30,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:33:30,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:30,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:33:30,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:31,329 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-14 23:33:31,575 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-14 23:33:31,759 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2020-10-14 23:33:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:31,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21463534] [2020-10-14 23:33:31,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:31,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:33:31,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92916118] [2020-10-14 23:33:31,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:33:31,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:33:31,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:33:31,781 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 22 states. [2020-10-14 23:33:32,584 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-14 23:33:32,774 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-14 23:33:33,009 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2020-10-14 23:33:33,275 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2020-10-14 23:33:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:33,582 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2020-10-14 23:33:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:33:33,585 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-14 23:33:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:33,586 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:33:33,586 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 23:33:33,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:33:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 23:33:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-14 23:33:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 23:33:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-14 23:33:33,596 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 46 [2020-10-14 23:33:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:33,596 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-14 23:33:33,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:33:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-14 23:33:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:33:33,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:33,597 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:33,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:33:33,597 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash 361425002, now seen corresponding path program 9 times [2020-10-14 23:33:33,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:33,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070873454] [2020-10-14 23:33:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:33,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:33,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:34,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:35,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:35,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:35,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:36,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:38,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:38,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:33:38,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:33:38,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 23:33:38,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:38,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:38,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:33:38,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:33:38,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:33:38,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:38,861 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-14 23:33:39,018 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-14 23:33:39,148 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-14 23:33:39,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:39,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:39,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:39,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:39,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:39,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:39,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:39,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:39,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:39,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:33:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:39,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:39,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:33:39,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:39,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-14 23:33:39,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:39,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:39,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:33:39,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:39,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:33:39,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:40,725 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-14 23:33:41,112 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 56 [2020-10-14 23:33:41,554 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 57 [2020-10-14 23:33:42,148 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 74 [2020-10-14 23:33:42,848 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 78 [2020-10-14 23:33:45,037 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 454 DAG size of output: 69 [2020-10-14 23:33:46,887 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 349 DAG size of output: 64 [2020-10-14 23:33:47,801 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 60 [2020-10-14 23:33:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:47,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070873454] [2020-10-14 23:33:47,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:47,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:33:47,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673891074] [2020-10-14 23:33:47,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:33:47,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:33:47,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:33:47,837 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 26 states. [2020-10-14 23:33:48,698 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-14 23:33:48,927 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:33:49,225 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2020-10-14 23:33:49,757 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-14 23:33:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:50,663 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2020-10-14 23:33:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:33:50,664 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 48 [2020-10-14 23:33:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:50,665 INFO L225 Difference]: With dead ends: 115 [2020-10-14 23:33:50,665 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 23:33:50,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:33:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 23:33:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2020-10-14 23:33:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 23:33:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-10-14 23:33:50,683 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 48 [2020-10-14 23:33:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:50,683 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-10-14 23:33:50,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:33:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-10-14 23:33:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:33:50,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:50,684 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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 23:33:50,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:33:50,684 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1682112190, now seen corresponding path program 7 times [2020-10-14 23:33:50,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:50,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38517778] [2020-10-14 23:33:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:50,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:50,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:51,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:52,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:55,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:56,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:56,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:33:56,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:33:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5534 [2020-10-14 23:33:56,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:56,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:33:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:33:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:33:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:56,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:56,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:56,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:56,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:56,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:56,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:56,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:56,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:56,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:33:56,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:33:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:56,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:57,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:57,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:33:57,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:57,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-14 23:33:57,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:57,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:57,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:33:57,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:57,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:33:57,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:58,058 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 57 [2020-10-14 23:33:58,352 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2020-10-14 23:33:58,765 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2020-10-14 23:33:59,119 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 54 [2020-10-14 23:33:59,379 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 42 [2020-10-14 23:33:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:59,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38517778] [2020-10-14 23:33:59,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:59,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:33:59,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457841039] [2020-10-14 23:33:59,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:33:59,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:59,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:33:59,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:33:59,406 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 24 states. [2020-10-14 23:34:00,200 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-14 23:34:00,576 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-14 23:34:00,822 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-14 23:34:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:01,199 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-10-14 23:34:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:34:01,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-14 23:34:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:01,201 INFO L225 Difference]: With dead ends: 117 [2020-10-14 23:34:01,201 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 23:34:01,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:34:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 23:34:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2020-10-14 23:34:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 23:34:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-14 23:34:01,215 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 49 [2020-10-14 23:34:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:01,215 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-14 23:34:01,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:34:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-14 23:34:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:34:01,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:01,216 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:01,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:34:01,216 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1401141770, now seen corresponding path program 1 times [2020-10-14 23:34:01,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:01,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547689626] [2020-10-14 23:34:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:02,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:02,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:06,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:06,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:34:06,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:34:06,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-14 23:34:06,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:06,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:06,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:34:06,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:34:06,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 23:34:06,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:06,588 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-14 23:34:06,707 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-14 23:34:06,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:06,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:07,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:07,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:07,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:07,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:07,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:07,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:07,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:07,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:07,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:07,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:07,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:34:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:07,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:07,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:34:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:07,999 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-14 23:34:08,366 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-14 23:34:08,600 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-14 23:34:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:08,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547689626] [2020-10-14 23:34:08,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:08,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:34:08,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718100728] [2020-10-14 23:34:08,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:34:08,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:34:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:34:08,799 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 26 states. [2020-10-14 23:34:09,574 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-14 23:34:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:10,627 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2020-10-14 23:34:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:34:10,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-10-14 23:34:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:10,631 INFO L225 Difference]: With dead ends: 99 [2020-10-14 23:34:10,631 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 23:34:10,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:34:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 23:34:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-14 23:34:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:34:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-10-14 23:34:10,641 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 51 [2020-10-14 23:34:10,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:10,641 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-10-14 23:34:10,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:34:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-10-14 23:34:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:34:10,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:10,642 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:10,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:34:10,642 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:10,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:10,642 INFO L82 PathProgramCache]: Analyzing trace with hash -269837939, now seen corresponding path program 10 times [2020-10-14 23:34:10,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:10,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772578817] [2020-10-14 23:34:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:10,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:10,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:12,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:14,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:14,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:34:14,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4114 [2020-10-14 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:15,105 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-14 23:34:15,356 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-10-14 23:34:15,484 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-14 23:34:15,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:15,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:15,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:15,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:15,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:15,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:34:15,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:15,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:15,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:15,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:15,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:34:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:15,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:16,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:16,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:34:16,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:16,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-14 23:34:16,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:16,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:34:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:34:16,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:16,923 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-14 23:34:17,251 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-14 23:34:17,424 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-14 23:34:17,734 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-14 23:34:17,929 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-14 23:34:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:18,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772578817] [2020-10-14 23:34:18,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:18,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:34:18,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064276438] [2020-10-14 23:34:18,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:34:18,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:34:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:34:18,110 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 25 states. [2020-10-14 23:34:19,285 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-10-14 23:34:19,694 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-14 23:34:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:20,415 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2020-10-14 23:34:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:34:20,415 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-14 23:34:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:20,416 INFO L225 Difference]: With dead ends: 129 [2020-10-14 23:34:20,416 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 23:34:20,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:34:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 23:34:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2020-10-14 23:34:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 23:34:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-10-14 23:34:20,430 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 51 [2020-10-14 23:34:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:20,430 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-10-14 23:34:20,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:34:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-10-14 23:34:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:34:20,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:20,430 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:20,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:34:20,431 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:20,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1794009065, now seen corresponding path program 11 times [2020-10-14 23:34:20,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:20,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992459862] [2020-10-14 23:34:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:21,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:22,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:23,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:24,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:25,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:25,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:34:25,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:34:25,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 23:34:25,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:25,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:34:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:34:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:34:25,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:25,785 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-14 23:34:25,955 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-14 23:34:26,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:26,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:26,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:26,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:26,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:26,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:26,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:26,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:26,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:26,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:26,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:26,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:26,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:34:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:26,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:34:26,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:27,423 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-14 23:34:27,579 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-14 23:34:27,866 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-14 23:34:28,165 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-14 23:34:28,537 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 79 [2020-10-14 23:34:28,973 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2020-10-14 23:34:29,470 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-14 23:34:29,937 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-14 23:34:30,297 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-14 23:34:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:30,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992459862] [2020-10-14 23:34:30,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:30,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:34:30,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069929800] [2020-10-14 23:34:30,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:34:30,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:34:30,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:34:30,335 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand 26 states. [2020-10-14 23:34:31,245 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-14 23:34:31,495 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-14 23:34:31,766 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-14 23:34:32,161 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2020-10-14 23:34:32,596 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 97 [2020-10-14 23:34:33,131 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2020-10-14 23:34:33,746 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2020-10-14 23:34:34,567 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 147 [2020-10-14 23:34:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:35,212 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-14 23:34:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:34:35,213 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-10-14 23:34:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:35,214 INFO L225 Difference]: With dead ends: 124 [2020-10-14 23:34:35,214 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 23:34:35,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:34:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 23:34:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2020-10-14 23:34:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 23:34:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-10-14 23:34:35,228 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 51 [2020-10-14 23:34:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:35,228 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-10-14 23:34:35,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:34:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-10-14 23:34:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:34:35,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:35,229 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:35,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:34:35,230 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash 223573119, now seen corresponding path program 8 times [2020-10-14 23:34:35,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:35,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228815995] [2020-10-14 23:34:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:35,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:35,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:36,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:39,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:40,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:40,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:34:40,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:34:40,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5452 [2020-10-14 23:34:40,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:40,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:40,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:34:40,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:34:40,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:34:40,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:40,991 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-14 23:34:41,131 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-14 23:34:41,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:41,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:41,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:41,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:41,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:41,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:41,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:41,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:41,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:41,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:41,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:41,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:41,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:34:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:41,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:42,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:42,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:34:42,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:42,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-14 23:34:42,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:42,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:42,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:34:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:34:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:43,103 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-14 23:34:43,311 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-14 23:34:43,518 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-14 23:34:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:43,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228815995] [2020-10-14 23:34:43,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:43,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:34:43,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801042719] [2020-10-14 23:34:43,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:34:43,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:34:43,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:34:43,722 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 28 states. [2020-10-14 23:34:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:45,645 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-14 23:34:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:34:45,646 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2020-10-14 23:34:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:45,647 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:34:45,647 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 23:34:45,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:34:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 23:34:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-10-14 23:34:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 23:34:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2020-10-14 23:34:45,662 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 52 [2020-10-14 23:34:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:45,662 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2020-10-14 23:34:45,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:34:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2020-10-14 23:34:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:34:45,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:45,662 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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 23:34:45,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:34:45,663 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash 218908469, now seen corresponding path program 9 times [2020-10-14 23:34:45,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:45,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615280847] [2020-10-14 23:34:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:45,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:45,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:47,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:48,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:49,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:50,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:50,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:34:50,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:34:50,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 23:34:50,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:50,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:34:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:50,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:34:50,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:51,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:51,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:51,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:51,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:51,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:51,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:51,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:51,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:51,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:51,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:51,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:51,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:51,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:34:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:51,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:51,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:51,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:51,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:51,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:34:51,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:34:51,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-14 23:34:51,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:51,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:34:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:34:51,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-14 23:34:51,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615280847] [2020-10-14 23:34:51,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:51,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:34:51,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40743405] [2020-10-14 23:34:51,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:34:51,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:34:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:34:51,607 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand 17 states. [2020-10-14 23:34:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:52,429 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-10-14 23:34:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:34:52,429 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-14 23:34:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:52,431 INFO L225 Difference]: With dead ends: 123 [2020-10-14 23:34:52,431 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 23:34:52,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:34:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 23:34:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2020-10-14 23:34:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 23:34:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2020-10-14 23:34:52,448 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 52 [2020-10-14 23:34:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:52,449 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2020-10-14 23:34:52,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:34:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2020-10-14 23:34:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:34:52,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:52,450 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:52,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:34:52,450 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:52,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1249914560, now seen corresponding path program 12 times [2020-10-14 23:34:52,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:52,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338813174] [2020-10-14 23:34:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:52,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:52,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:55,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:55,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:56,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:57,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:57,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:34:57,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:34:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 23:34:57,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:57,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:34:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:34:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:34:57,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:57,823 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-14 23:34:58,063 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-14 23:34:58,235 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-14 23:34:58,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:58,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:58,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:58,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:58,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:58,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:58,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:58,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:58,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:58,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:34:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:58,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:59,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:59,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:34:59,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:59,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-14 23:34:59,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:59,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:34:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:34:59,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:00,652 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-14 23:35:00,899 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-14 23:35:01,334 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 61 [2020-10-14 23:35:01,781 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 56 [2020-10-14 23:35:02,349 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 71 [2020-10-14 23:35:05,180 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 374 DAG size of output: 77 [2020-10-14 23:35:07,134 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 466 DAG size of output: 89 [2020-10-14 23:35:10,021 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 460 DAG size of output: 91 [2020-10-14 23:35:12,887 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 508 DAG size of output: 82 [2020-10-14 23:35:27,789 WARN L193 SmtUtils]: Spent 13.67 s on a formula simplification. DAG size of input: 1689 DAG size of output: 64 [2020-10-14 23:35:28,733 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 66 [2020-10-14 23:35:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:28,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338813174] [2020-10-14 23:35:28,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:28,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:35:28,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203347231] [2020-10-14 23:35:28,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:35:28,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:28,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:35:28,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:35:28,798 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand 29 states. [2020-10-14 23:35:29,825 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:35:30,259 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-14 23:35:30,549 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 23:35:30,906 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-10-14 23:35:31,205 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-14 23:35:31,730 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2020-10-14 23:35:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:32,800 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-14 23:35:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:35:32,801 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2020-10-14 23:35:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:32,803 INFO L225 Difference]: With dead ends: 159 [2020-10-14 23:35:32,803 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 23:35:32,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:35:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 23:35:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2020-10-14 23:35:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 23:35:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-10-14 23:35:32,820 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 54 [2020-10-14 23:35:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:32,821 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-10-14 23:35:32,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:35:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-10-14 23:35:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 23:35:32,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:32,822 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:32,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:35:32,822 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash 91260332, now seen corresponding path program 10 times [2020-10-14 23:35:32,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:32,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041982173] [2020-10-14 23:35:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:32,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:33,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:37,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:37,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:35:37,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:35:37,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4961 [2020-10-14 23:35:37,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:37,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:35:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:35:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:35:37,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:38,192 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-14 23:35:38,531 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-14 23:35:38,715 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-14 23:35:38,858 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-14 23:35:39,001 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-14 23:35:39,162 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-14 23:35:39,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:39,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:39,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:39,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:39,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:39,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:39,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:39,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:39,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:39,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:35:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:39,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:39,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:39,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:35:39,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:39,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-14 23:35:39,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:39,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:35:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:40,374 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-14 23:35:40,727 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-14 23:35:40,923 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-14 23:35:41,341 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-14 23:35:41,701 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-14 23:35:42,243 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2020-10-14 23:35:42,815 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 71 [2020-10-14 23:35:43,433 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 69 [2020-10-14 23:35:44,099 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 51 [2020-10-14 23:35:44,473 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2020-10-14 23:35:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:44,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041982173] [2020-10-14 23:35:44,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:44,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:35:44,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401632678] [2020-10-14 23:35:44,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:35:44,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:44,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:35:44,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:35:44,516 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 27 states. [2020-10-14 23:35:45,514 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-14 23:35:45,697 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-14 23:35:45,933 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-14 23:35:46,197 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-10-14 23:35:46,486 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2020-10-14 23:35:46,799 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-14 23:35:47,301 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-14 23:35:47,662 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-14 23:35:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:48,307 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2020-10-14 23:35:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:35:48,307 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-10-14 23:35:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:48,309 INFO L225 Difference]: With dead ends: 161 [2020-10-14 23:35:48,309 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 23:35:48,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=137, Invalid=1669, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:35:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 23:35:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2020-10-14 23:35:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 23:35:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2020-10-14 23:35:48,329 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 55 [2020-10-14 23:35:48,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:48,329 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2020-10-14 23:35:48,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:35:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2020-10-14 23:35:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:35:48,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:48,331 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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 23:35:48,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:35:48,331 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:48,331 INFO L82 PathProgramCache]: Analyzing trace with hash 799351351, now seen corresponding path program 1 times [2020-10-14 23:35:48,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:48,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094145565] [2020-10-14 23:35:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:48,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:49,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:50,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:52,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:53,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:53,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:35:53,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:35:53,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:35:53,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:53,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:35:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:35:53,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:35:53,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:53,632 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-14 23:35:53,789 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-14 23:35:53,910 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-10-14 23:35:54,061 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-14 23:35:54,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:54,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:54,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:54,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:54,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:54,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:54,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:54,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:54,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:54,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 23:35:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:54,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:54,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:54,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:35:54,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:54,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-14 23:35:54,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:54,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:54,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:35:54,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:54,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:35:54,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:55,723 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-14 23:35:55,925 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-14 23:35:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:56,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094145565] [2020-10-14 23:35:56,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:56,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:35:56,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915222649] [2020-10-14 23:35:56,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:35:56,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:56,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:35:56,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:35:56,113 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 28 states. [2020-10-14 23:35:57,596 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-14 23:35:57,853 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-14 23:35:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:58,880 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2020-10-14 23:35:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:35:58,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-14 23:35:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:58,882 INFO L225 Difference]: With dead ends: 150 [2020-10-14 23:35:58,882 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 23:35:58,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:35:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 23:35:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-14 23:35:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 23:35:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2020-10-14 23:35:58,903 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 56 [2020-10-14 23:35:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:58,903 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2020-10-14 23:35:58,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:35:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2020-10-14 23:35:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:35:58,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:58,904 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:58,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:35:58,904 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:58,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1873435168, now seen corresponding path program 2 times [2020-10-14 23:35:58,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:58,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716225066] [2020-10-14 23:35:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:58,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:58,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:59,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:04,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:04,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 23:36:04,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:36:04,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-14 23:36:04,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:04,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:04,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:36:04,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:04,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 23:36:04,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0