/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:45:18,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:45:18,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:45:18,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:45:18,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:45:18,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:45:18,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:45:18,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:45:18,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:45:18,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:45:18,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:45:18,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:45:18,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:45:18,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:45:18,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:45:18,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:45:18,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:45:18,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:45:18,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:45:18,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:45:18,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:45:18,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:45:18,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:45:18,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:45:18,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:45:18,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:45:18,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:45:18,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:45:18,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:45:18,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:45:18,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:45:18,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:45:18,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:45:18,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:45:18,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:45:18,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:45:18,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:45:18,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:45:18,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:45:18,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:45:18,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:45:18,273 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 [2020-10-29 09:45:18,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:45:18,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:45:18,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:45:18,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:45:18,342 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:45:18,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:45:18,343 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:45:18,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:45:18,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:45:18,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:45:18,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:45:18,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:45:18,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:45:18,346 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:45:18,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:45:18,346 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:45:18,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:45:18,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:45:18,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:45:18,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:45:18,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:45:18,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:45:18,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:45:18,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:45:18,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:45:18,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:45:18,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:45:18,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:45:18,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:45:18,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:45:18,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:45:18,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:45:18,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:45:18,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:45:18,857 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:45:18,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2020-10-29 09:45:18,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5381a9f58/502c32e360714c1794c7f9ec9e31bdc1/FLAG959373b6d [2020-10-29 09:45:19,498 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:45:19,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_2.i [2020-10-29 09:45:19,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5381a9f58/502c32e360714c1794c7f9ec9e31bdc1/FLAG959373b6d [2020-10-29 09:45:19,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5381a9f58/502c32e360714c1794c7f9ec9e31bdc1 [2020-10-29 09:45:19,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:45:19,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:45:19,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:45:19,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:45:19,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:45:19,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:45:19" (1/1) ... [2020-10-29 09:45:19,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b560c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:19, skipping insertion in model container [2020-10-29 09:45:19,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:45:19" (1/1) ... [2020-10-29 09:45:19,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:45:19,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:45:20,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:45:20,187 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:45:20,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:45:20,224 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:45:20,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20 WrapperNode [2020-10-29 09:45:20,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:45:20,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:45:20,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:45:20,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:45:20,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (1/1) ... [2020-10-29 09:45:20,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (1/1) ... [2020-10-29 09:45:20,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (1/1) ... [2020-10-29 09:45:20,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (1/1) ... [2020-10-29 09:45:20,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (1/1) ... [2020-10-29 09:45:20,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (1/1) ... [2020-10-29 09:45:20,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (1/1) ... [2020-10-29 09:45:20,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:45:20,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:45:20,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:45:20,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:45:20,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (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 [2020-10-29 09:45:20,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:45:20,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:45:20,343 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:45:20,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:45:20,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:45:20,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:45:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:45:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:45:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:45:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:45:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:45:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:45:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:45:20,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:45:20,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:45:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:45:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:45:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:45:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:45:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:45:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:45:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:45:20,815 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:45:20,816 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:45:20,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:45:20 BoogieIcfgContainer [2020-10-29 09:45:20,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:45:20,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:45:20,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:45:20,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:45:20,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:45:19" (1/3) ... [2020-10-29 09:45:20,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61004e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:45:20, skipping insertion in model container [2020-10-29 09:45:20,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:45:20" (2/3) ... [2020-10-29 09:45:20,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61004e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:45:20, skipping insertion in model container [2020-10-29 09:45:20,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:45:20" (3/3) ... [2020-10-29 09:45:20,831 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2020-10-29 09:45:20,843 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:45:20,848 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:45:20,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:45:20,906 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:45:20,906 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:45:20,906 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:45:20,907 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:45:20,907 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:45:20,907 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:45:20,907 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:45:20,907 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:45:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-29 09:45:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:45:20,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:20,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:20,946 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1926597601, now seen corresponding path program 1 times [2020-10-29 09:45:20,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:20,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145121805] [2020-10-29 09:45:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:21,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:21,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:21,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:45:21,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:21,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-29 09:45:21,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:21,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:21,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:45:21,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:21,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:45:21,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:45:21,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:21,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:21,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:21,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:21,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:21,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 09:45:21,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:21,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:21,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:21,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:21,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:21,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:21,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145121805] [2020-10-29 09:45:21,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:45:21,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:45:21,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847823117] [2020-10-29 09:45:21,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:45:21,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:21,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:45:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:45:21,556 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2020-10-29 09:45:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:21,673 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-29 09:45:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:45:21,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-29 09:45:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:21,682 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:45:21,683 INFO L226 Difference]: Without dead ends: 17 [2020-10-29 09:45:21,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:45:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-29 09:45:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-29 09:45:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:45:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-29 09:45:21,728 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-29 09:45:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:21,729 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-29 09:45:21,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:45:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-29 09:45:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:45:21,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:21,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:21,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:45:21,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:21,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2115061181, now seen corresponding path program 1 times [2020-10-29 09:45:21,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:21,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496041510] [2020-10-29 09:45:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:21,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:21,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:45:21,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:21,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-29 09:45:21,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:21,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:21,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:45:21,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:21,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:45:21,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:21,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:21,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:21,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:21,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:21,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:21,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 09:45:21,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:21,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:21,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:21,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:21,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:21,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:22,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496041510] [2020-10-29 09:45:22,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:22,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:45:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983182614] [2020-10-29 09:45:22,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:45:22,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:22,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:45:22,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:45:22,015 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-29 09:45:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:22,155 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-29 09:45:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:45:22,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-29 09:45:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:22,157 INFO L225 Difference]: With dead ends: 26 [2020-10-29 09:45:22,157 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:45:22,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:45:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:45:22,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-29 09:45:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:45:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-29 09:45:22,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-29 09:45:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:22,173 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-29 09:45:22,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:45:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-29 09:45:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:45:22,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:22,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:22,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:45:22,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:22,179 INFO L82 PathProgramCache]: Analyzing trace with hash -796252197, now seen corresponding path program 2 times [2020-10-29 09:45:22,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:22,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869872374] [2020-10-29 09:45:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:22,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:22,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:22,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:45:22,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:22,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-29 09:45:22,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:22,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:22,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:45:22,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:45:22,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:22,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:22,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:22,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:22,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:22,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:45:22,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:22,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:22,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:22,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:22,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:22,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:22,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869872374] [2020-10-29 09:45:22,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:22,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:45:22,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450238927] [2020-10-29 09:45:22,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:45:22,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:22,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:45:22,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:45:22,419 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-10-29 09:45:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:22,556 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-29 09:45:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:45:22,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 09:45:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:22,558 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:45:22,558 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:45:22,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:45:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:45:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-29 09:45:22,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:45:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-29 09:45:22,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-29 09:45:22,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:22,568 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-29 09:45:22,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:45:22,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-29 09:45:22,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:45:22,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:22,569 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:22,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:45:22,570 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:22,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1750268537, now seen corresponding path program 3 times [2020-10-29 09:45:22,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:22,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485989325] [2020-10-29 09:45:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:22,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:22,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:45:22,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:22,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-29 09:45:22,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:22,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:22,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:45:22,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:22,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:45:22,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:22,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:22,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:22,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:22,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:22,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:45:22,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:22,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:22,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:22,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:22,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:22,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:22,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485989325] [2020-10-29 09:45:22,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:22,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:45:22,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255233782] [2020-10-29 09:45:22,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:45:22,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:45:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:45:22,747 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-10-29 09:45:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:22,905 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-29 09:45:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:45:22,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-29 09:45:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:22,906 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:45:22,906 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:45:22,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:45:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:45:22,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-29 09:45:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:45:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-29 09:45:22,914 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-29 09:45:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:22,914 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-29 09:45:22,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:45:22,915 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-29 09:45:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:45:22,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:22,916 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:22,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:45:22,916 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:22,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash 825335191, now seen corresponding path program 4 times [2020-10-29 09:45:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:22,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697376985] [2020-10-29 09:45:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:22,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:23,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:23,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:45:23,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:23,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-29 09:45:23,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:23,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:23,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:45:23,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:23,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:45:23,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:23,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:23,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:23,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:23,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:23,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:23,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:45:23,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:23,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:23,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:23,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:23,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:23,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697376985] [2020-10-29 09:45:23,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:23,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:45:23,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790141944] [2020-10-29 09:45:23,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:45:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:23,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:45:23,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:45:23,146 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2020-10-29 09:45:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:23,345 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-29 09:45:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:45:23,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-29 09:45:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:23,347 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:45:23,349 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:45:23,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:45:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:45:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-29 09:45:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:45:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-29 09:45:23,358 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-29 09:45:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:23,358 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-29 09:45:23,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:45:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-29 09:45:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:45:23,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:23,361 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:23,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:45:23,361 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:23,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1022619957, now seen corresponding path program 5 times [2020-10-29 09:45:23,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:23,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669828391] [2020-10-29 09:45:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:23,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:23,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:23,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:45:23,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-29 09:45:23,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:23,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:45:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:45:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:23,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:23,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:23,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:23,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:23,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:45:23,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:23,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:23,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:23,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:45:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:23,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669828391] [2020-10-29 09:45:23,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:23,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:45:23,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907611004] [2020-10-29 09:45:23,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:45:23,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:23,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:45:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:45:23,624 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-10-29 09:45:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:23,904 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-29 09:45:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:45:23,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-29 09:45:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:23,905 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:45:23,905 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:45:23,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:45:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:45:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-29 09:45:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:45:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-29 09:45:23,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-29 09:45:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:23,913 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-29 09:45:23,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:45:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-29 09:45:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:45:23,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:23,914 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:23,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:45:23,914 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:23,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1634719059, now seen corresponding path program 6 times [2020-10-29 09:45:23,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:23,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192351123] [2020-10-29 09:45:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:24,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:24,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:45:24,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:24,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-29 09:45:24,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:24,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:24,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:45:24,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:24,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:45:24,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:24,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:24,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:24,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:24,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:24,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:45:24,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:24,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:24,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:24,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192351123] [2020-10-29 09:45:24,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:24,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:45:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196450829] [2020-10-29 09:45:24,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:45:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:45:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:45:24,143 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2020-10-29 09:45:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:24,418 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-29 09:45:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:45:24,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-29 09:45:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:24,420 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:45:24,420 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:45:24,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:45:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:45:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-29 09:45:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:45:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-29 09:45:24,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-29 09:45:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:24,427 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-29 09:45:24,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:45:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-29 09:45:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:45:24,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:24,429 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:24,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:45:24,429 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:24,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1451436529, now seen corresponding path program 7 times [2020-10-29 09:45:24,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:24,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197579493] [2020-10-29 09:45:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:24,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:24,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:45:24,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:24,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-29 09:45:24,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:24,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:24,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:45:24,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:24,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:45:24,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:24,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:24,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:24,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:24,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:24,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:24,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:45:24,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:24,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:24,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:24,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:24,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:24,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:24,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197579493] [2020-10-29 09:45:24,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:24,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:45:24,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564890753] [2020-10-29 09:45:24,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:45:24,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:24,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:45:24,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:45:24,638 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-10-29 09:45:25,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:25,047 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-29 09:45:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:45:25,056 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-29 09:45:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:25,056 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:45:25,057 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:45:25,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:45:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:45:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-29 09:45:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:45:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-29 09:45:25,065 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-29 09:45:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:25,065 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-29 09:45:25,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:45:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-29 09:45:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:45:25,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:25,071 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:25,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:45:25,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1410584335, now seen corresponding path program 8 times [2020-10-29 09:45:25,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:25,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134211578] [2020-10-29 09:45:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:45:25,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-29 09:45:25,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:25,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:45:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:45:25,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:25,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:25,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:25,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:25,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:25,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:25,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:25,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:25,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:25,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:25,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:25,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:25,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:25,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134211578] [2020-10-29 09:45:25,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:25,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:45:25,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470923762] [2020-10-29 09:45:25,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:45:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:45:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:45:25,308 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 12 states. [2020-10-29 09:45:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:25,668 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-29 09:45:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:45:25,668 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-29 09:45:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:25,669 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:45:25,669 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:45:25,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:45:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:45:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-29 09:45:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:45:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-29 09:45:25,690 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-29 09:45:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:25,690 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-29 09:45:25,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:45:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-29 09:45:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:45:25,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:25,692 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:25,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:45:25,692 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 806331565, now seen corresponding path program 9 times [2020-10-29 09:45:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:25,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640571407] [2020-10-29 09:45:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:25,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:25,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:25,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:45:25,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:25,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-29 09:45:25,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:25,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:45:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:45:25,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:25,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:25,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:25,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:25,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:25,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:25,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:45:25,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:25,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:25,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:25,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:25,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640571407] [2020-10-29 09:45:25,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:25,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:45:25,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825102294] [2020-10-29 09:45:25,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:45:25,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:45:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:45:25,973 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-10-29 09:45:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:26,407 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-29 09:45:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:45:26,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-29 09:45:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:26,410 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:45:26,410 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:45:26,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:45:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:45:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-29 09:45:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:45:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-29 09:45:26,427 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-10-29 09:45:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:26,428 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-29 09:45:26,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:45:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-29 09:45:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:45:26,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:26,429 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:26,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:45:26,429 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash -59995445, now seen corresponding path program 10 times [2020-10-29 09:45:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:26,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638958140] [2020-10-29 09:45:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:26,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:26,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:26,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:45:26,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:26,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-29 09:45:26,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:26,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:45:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:45:26,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:26,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:26,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:26,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:26,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:26,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:26,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:45:26,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:26,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:26,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:26,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638958140] [2020-10-29 09:45:26,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:26,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:45:26,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98055893] [2020-10-29 09:45:26,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:45:26,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:45:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:45:26,787 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 14 states. [2020-10-29 09:45:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:27,247 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-29 09:45:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:45:27,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-29 09:45:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:27,249 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:45:27,249 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:45:27,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:45:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:45:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-29 09:45:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:45:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-29 09:45:27,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-10-29 09:45:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:27,263 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-29 09:45:27,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:45:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-29 09:45:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:45:27,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:27,266 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:27,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:45:27,267 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash 623403369, now seen corresponding path program 11 times [2020-10-29 09:45:27,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:27,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152707704] [2020-10-29 09:45:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:27,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:27,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:27,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:45:27,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:27,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-29 09:45:27,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:27,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:45:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:45:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:27,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:27,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:27,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:27,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:27,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:27,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:45:27,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:27,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:27,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:27,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:27,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:27,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:27,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152707704] [2020-10-29 09:45:27,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:27,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:45:27,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739130016] [2020-10-29 09:45:27,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:45:27,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:45:27,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:45:27,648 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 15 states. [2020-10-29 09:45:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:28,178 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-29 09:45:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:45:28,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-29 09:45:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:28,180 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:45:28,180 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:45:28,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:45:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:45:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-29 09:45:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:45:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-29 09:45:28,189 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-10-29 09:45:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:28,190 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-29 09:45:28,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:45:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-29 09:45:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:45:28,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:28,191 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:28,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:45:28,191 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:28,192 INFO L82 PathProgramCache]: Analyzing trace with hash 239667335, now seen corresponding path program 12 times [2020-10-29 09:45:28,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:28,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508845789] [2020-10-29 09:45:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:28,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:28,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:28,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:45:28,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:28,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-29 09:45:28,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:28,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:28,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:45:28,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:28,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:45:28,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:28,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:28,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:28,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:28,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:28,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:28,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:28,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:28,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:28,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:28,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508845789] [2020-10-29 09:45:28,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:28,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:45:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323963163] [2020-10-29 09:45:28,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:45:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:28,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:45:28,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:45:28,541 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 16 states. [2020-10-29 09:45:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:29,147 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-29 09:45:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:45:29,148 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 09:45:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:29,149 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:45:29,149 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:45:29,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:45:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:45:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-29 09:45:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:45:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-29 09:45:29,163 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-10-29 09:45:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:29,163 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-29 09:45:29,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:45:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-29 09:45:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:45:29,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:29,169 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:29,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:45:29,170 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash 836526117, now seen corresponding path program 13 times [2020-10-29 09:45:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:29,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149094166] [2020-10-29 09:45:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:29,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:29,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:29,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:45:29,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:29,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-29 09:45:29,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:29,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:29,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:45:29,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:29,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:45:29,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:29,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:29,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:29,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:29,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:29,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:45:29,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:29,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:29,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:29,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:29,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:29,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:29,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149094166] [2020-10-29 09:45:29,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:29,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:45:29,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718352095] [2020-10-29 09:45:29,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:45:29,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:29,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:45:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:45:29,644 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 17 states. [2020-10-29 09:45:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:30,313 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-29 09:45:30,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:45:30,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-29 09:45:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:30,314 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:45:30,314 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:45:30,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:45:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:45:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-29 09:45:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:45:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-29 09:45:30,330 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-10-29 09:45:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:30,330 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-29 09:45:30,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:45:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-29 09:45:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:45:30,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:30,334 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:30,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:45:30,334 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:30,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1107802045, now seen corresponding path program 14 times [2020-10-29 09:45:30,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:30,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235270838] [2020-10-29 09:45:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:30,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:30,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:45:30,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-29 09:45:30,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:30,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:30,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:45:30,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:30,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:45:30,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:45:30,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:30,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:30,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:30,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:30,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:45:30,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:30,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:30,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:30,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235270838] [2020-10-29 09:45:30,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:30,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:45:30,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524769502] [2020-10-29 09:45:30,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:45:30,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:30,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:45:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:45:30,817 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 18 states. [2020-10-29 09:45:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:31,500 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-29 09:45:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:45:31,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-29 09:45:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:31,502 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:45:31,502 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:45:31,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:45:31,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:45:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-29 09:45:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:45:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-29 09:45:31,515 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-10-29 09:45:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:31,515 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-29 09:45:31,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:45:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-29 09:45:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:45:31,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:31,518 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:31,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:45:31,519 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:31,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1296391967, now seen corresponding path program 15 times [2020-10-29 09:45:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:31,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809797035] [2020-10-29 09:45:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:31,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:31,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:31,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:45:31,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:31,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-29 09:45:31,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:31,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:45:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:45:31,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:32,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:32,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:32,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:32,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:32,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:32,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:45:32,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:32,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:32,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:32,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809797035] [2020-10-29 09:45:32,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:32,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:45:32,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56970356] [2020-10-29 09:45:32,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:45:32,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:45:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:45:32,028 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2020-10-29 09:45:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:32,755 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-29 09:45:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:45:32,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-29 09:45:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:32,758 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:45:32,758 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:45:32,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:45:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:45:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-29 09:45:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:45:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-29 09:45:32,775 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-10-29 09:45:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:32,775 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-29 09:45:32,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:45:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-29 09:45:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:45:32,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:32,776 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:32,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:45:32,777 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2142680577, now seen corresponding path program 16 times [2020-10-29 09:45:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:32,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311929338] [2020-10-29 09:45:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:32,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:33,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:33,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:45:33,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:33,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-29 09:45:33,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:33,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:33,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:45:33,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:33,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:45:33,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:33,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:33,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:33,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:33,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:33,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:33,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:33,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:33,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:33,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:33,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311929338] [2020-10-29 09:45:33,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:33,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:45:33,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279588137] [2020-10-29 09:45:33,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:45:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:33,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:45:33,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:45:33,292 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 20 states. [2020-10-29 09:45:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:34,086 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-29 09:45:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:45:34,086 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-29 09:45:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:34,088 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:45:34,088 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:45:34,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:45:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:45:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-29 09:45:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:45:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-29 09:45:34,099 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-10-29 09:45:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:34,099 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-29 09:45:34,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:45:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-29 09:45:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:45:34,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:34,100 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:34,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:45:34,101 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash 617751453, now seen corresponding path program 17 times [2020-10-29 09:45:34,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:34,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518842120] [2020-10-29 09:45:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:34,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:34,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:45:34,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:34,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-29 09:45:34,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:34,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:45:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:45:34,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:34,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:34,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:34,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:34,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:34,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:34,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:45:34,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:34,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:34,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:34,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:34,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:34,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:34,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518842120] [2020-10-29 09:45:34,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:34,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:45:34,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357010483] [2020-10-29 09:45:34,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:45:34,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:34,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:45:34,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:45:34,649 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 21 states. [2020-10-29 09:45:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:35,445 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-29 09:45:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:45:35,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-29 09:45:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:35,446 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:45:35,446 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:45:35,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:45:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:45:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-29 09:45:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:45:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-29 09:45:35,455 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-10-29 09:45:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:35,456 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-29 09:45:35,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:45:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-29 09:45:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:45:35,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:35,457 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:35,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:45:35,457 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash -896856645, now seen corresponding path program 18 times [2020-10-29 09:45:35,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:35,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593460335] [2020-10-29 09:45:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:35,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:35,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:35,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:45:35,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:35,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-29 09:45:35,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:35,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:35,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:45:35,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:35,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:45:35,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:35,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:35,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:35,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:35,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:35,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:35,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:45:35,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:35,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:35,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:35,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:35,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:35,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:35,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593460335] [2020-10-29 09:45:35,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:35,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:45:35,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844358860] [2020-10-29 09:45:35,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:45:35,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:45:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:45:35,991 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 22 states. [2020-10-29 09:45:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:36,827 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-29 09:45:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:45:36,828 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-29 09:45:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:36,829 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:45:36,829 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:45:36,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:45:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:45:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-29 09:45:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:45:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-29 09:45:36,837 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-10-29 09:45:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:36,837 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-29 09:45:36,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:45:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-29 09:45:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:45:36,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:36,839 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:36,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:45:36,839 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:36,839 INFO L82 PathProgramCache]: Analyzing trace with hash -441325479, now seen corresponding path program 19 times [2020-10-29 09:45:36,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:36,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183728458] [2020-10-29 09:45:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:36,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:37,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:37,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:45:37,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:37,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-29 09:45:37,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:37,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:45:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:45:37,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:37,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:37,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:37,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:37,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:37,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:37,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:37,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:37,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:37,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:45:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183728458] [2020-10-29 09:45:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:45:37,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608665887] [2020-10-29 09:45:37,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:45:37,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:37,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:45:37,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:45:37,550 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 23 states. [2020-10-29 09:45:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:38,521 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-29 09:45:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:45:38,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-29 09:45:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:38,522 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:45:38,522 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:45:38,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:45:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:45:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-29 09:45:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:45:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-29 09:45:38,530 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-10-29 09:45:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:38,530 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-29 09:45:38,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:45:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-29 09:45:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:45:38,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:38,531 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:38,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:45:38,532 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash -762539145, now seen corresponding path program 20 times [2020-10-29 09:45:38,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:38,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122720854] [2020-10-29 09:45:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:38,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:38,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:45:38,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:38,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-29 09:45:38,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:38,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:45:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:45:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:39,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:39,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:39,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:39,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:39,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:39,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:39,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:39,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:39,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:39,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122720854] [2020-10-29 09:45:39,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:39,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:45:39,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142597569] [2020-10-29 09:45:39,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:45:39,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:39,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:45:39,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:45:39,216 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 24 states. [2020-10-29 09:45:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:40,245 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-29 09:45:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:45:40,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-29 09:45:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:40,247 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:45:40,247 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:45:40,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:45:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:45:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-29 09:45:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:45:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-29 09:45:40,263 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-10-29 09:45:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:40,264 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-29 09:45:40,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:45:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-29 09:45:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:45:40,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:40,265 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:40,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:45:40,265 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:40,266 INFO L82 PathProgramCache]: Analyzing trace with hash -211226859, now seen corresponding path program 21 times [2020-10-29 09:45:40,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:40,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051687520] [2020-10-29 09:45:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:40,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:40,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:40,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:45:40,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:40,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-29 09:45:40,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:40,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:40,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:45:40,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:40,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:45:40,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:40,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:40,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:40,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:40,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:40,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:40,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:40,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:40,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:40,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:40,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:40,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:40,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:40,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051687520] [2020-10-29 09:45:40,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:40,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:45:40,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143505988] [2020-10-29 09:45:40,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:45:40,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:40,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:45:40,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:45:40,985 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 25 states. [2020-10-29 09:45:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:41,975 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-29 09:45:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:45:41,979 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-29 09:45:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:41,980 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:45:41,980 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:45:41,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:45:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:45:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-29 09:45:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:45:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-29 09:45:41,987 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-10-29 09:45:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:41,988 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-29 09:45:41,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:45:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-29 09:45:41,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:45:41,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:41,989 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:41,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:45:41,989 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1318902579, now seen corresponding path program 22 times [2020-10-29 09:45:41,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:41,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587184164] [2020-10-29 09:45:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:42,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:42,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:45:42,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:42,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-29 09:45:42,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:42,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:42,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:45:42,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:42,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:45:42,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:42,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:42,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:42,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:42,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:42,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:42,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:42,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:42,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:42,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:42,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:42,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:42,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:42,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587184164] [2020-10-29 09:45:42,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:42,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:45:42,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901277465] [2020-10-29 09:45:42,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:45:42,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:42,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:45:42,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:45:42,744 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 26 states. [2020-10-29 09:45:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:43,880 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-29 09:45:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:45:43,882 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-29 09:45:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:43,883 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:45:43,883 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:45:43,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:45:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:45:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-29 09:45:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:45:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-29 09:45:43,890 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-10-29 09:45:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:43,890 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-29 09:45:43,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:45:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-29 09:45:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:45:43,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:43,891 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:43,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:45:43,892 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:43,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1400490031, now seen corresponding path program 23 times [2020-10-29 09:45:43,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:43,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833718341] [2020-10-29 09:45:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:43,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:44,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:44,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:45:44,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:44,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-29 09:45:44,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:44,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:44,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:45:44,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:44,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:45:44,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:44,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:44,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:44,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:44,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:44,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:44,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:44,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:44,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:44,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:44,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:44,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:44,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833718341] [2020-10-29 09:45:44,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:44,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:45:44,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307596610] [2020-10-29 09:45:44,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:45:44,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:45:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:45:44,637 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2020-10-29 09:45:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:45,928 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-29 09:45:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:45:45,929 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-29 09:45:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:45,930 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:45:45,930 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:45:45,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:45:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:45:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-29 09:45:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:45:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-29 09:45:45,938 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-10-29 09:45:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:45,939 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-29 09:45:45,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:45:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-29 09:45:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:45:45,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:45,940 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:45,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:45:45,940 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:45,940 INFO L82 PathProgramCache]: Analyzing trace with hash 898295023, now seen corresponding path program 24 times [2020-10-29 09:45:45,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:45,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695750219] [2020-10-29 09:45:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:45,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:46,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:46,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 09:45:46,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:46,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-29 09:45:46,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:46,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:45:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:45:46,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:46,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:46,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:46,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:46,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:46,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:46,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:45:46,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:46,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:46,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:46,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695750219] [2020-10-29 09:45:46,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:46,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:45:46,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399190580] [2020-10-29 09:45:46,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:45:46,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:45:46,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:45:46,719 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 28 states. [2020-10-29 09:45:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:48,004 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-29 09:45:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:45:48,004 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-29 09:45:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:48,005 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:45:48,005 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:45:48,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:45:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:45:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-29 09:45:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:45:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-29 09:45:48,012 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-10-29 09:45:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:48,012 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-29 09:45:48,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:45:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-29 09:45:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 09:45:48,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:48,013 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:48,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:45:48,013 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1877425523, now seen corresponding path program 25 times [2020-10-29 09:45:48,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:48,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17667945] [2020-10-29 09:45:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:48,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:48,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:45:48,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:48,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-29 09:45:48,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:48,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:48,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:45:48,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:48,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:45:48,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:48,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:48,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:48,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:48,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:48,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:48,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:48,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:48,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:48,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:48,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17667945] [2020-10-29 09:45:48,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:48,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:45:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356715819] [2020-10-29 09:45:48,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:45:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:45:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:45:48,857 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 29 states. [2020-10-29 09:45:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:50,238 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-29 09:45:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:45:50,239 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-29 09:45:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:50,240 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:45:50,240 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:45:50,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:45:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:45:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-29 09:45:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:45:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-29 09:45:50,248 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-10-29 09:45:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:50,249 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-29 09:45:50,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:45:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-29 09:45:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 09:45:50,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:50,250 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:50,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:45:50,250 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2124787883, now seen corresponding path program 26 times [2020-10-29 09:45:50,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:50,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042051480] [2020-10-29 09:45:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:50,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:50,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:50,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:45:50,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:50,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-29 09:45:50,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:50,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:45:50,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:50,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:45:50,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:51,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:51,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:51,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:51,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:51,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:51,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:51,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:51,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:51,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:51,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:51,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:51,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042051480] [2020-10-29 09:45:51,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:51,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:45:51,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108334833] [2020-10-29 09:45:51,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:45:51,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:45:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:45:51,175 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 30 states. [2020-10-29 09:45:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:52,620 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-29 09:45:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:45:52,621 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-29 09:45:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:52,622 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:45:52,622 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:45:52,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:45:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:45:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-29 09:45:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:45:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-29 09:45:52,629 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-10-29 09:45:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:52,629 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-29 09:45:52,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:45:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-29 09:45:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:45:52,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:52,630 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:52,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:45:52,631 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:52,631 INFO L82 PathProgramCache]: Analyzing trace with hash -38826167, now seen corresponding path program 27 times [2020-10-29 09:45:52,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:52,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614429005] [2020-10-29 09:45:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:52,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:52,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:52,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 09:45:52,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:52,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-29 09:45:52,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:52,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:45:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:45:52,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:53,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:53,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:53,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:53,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:53,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:53,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:53,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:53,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:53,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:53,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614429005] [2020-10-29 09:45:53,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:53,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:45:53,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898403594] [2020-10-29 09:45:53,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:45:53,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:45:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:45:53,638 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 31 states. [2020-10-29 09:45:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:55,231 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-29 09:45:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:45:55,231 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-29 09:45:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:55,232 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:45:55,232 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:45:55,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:45:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:45:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-29 09:45:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:45:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-29 09:45:55,240 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-10-29 09:45:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:55,241 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-29 09:45:55,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:45:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-29 09:45:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 09:45:55,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:55,242 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:55,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:45:55,242 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:55,243 INFO L82 PathProgramCache]: Analyzing trace with hash -507756953, now seen corresponding path program 28 times [2020-10-29 09:45:55,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:55,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183655820] [2020-10-29 09:45:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:55,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:55,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:55,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 09:45:55,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:55,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-29 09:45:55,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:55,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:55,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:45:55,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:55,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:45:55,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:45:56,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:56,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:56,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:56,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:56,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:56,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:45:56,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:56,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:56,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:56,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:56,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:56,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:56,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183655820] [2020-10-29 09:45:56,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:56,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:45:56,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846679865] [2020-10-29 09:45:56,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:45:56,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:45:56,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:45:56,395 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 32 states. [2020-10-29 09:45:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:57,921 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-29 09:45:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:45:57,921 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-29 09:45:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:57,922 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:45:57,923 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:45:57,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:45:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:45:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-29 09:45:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:45:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-29 09:45:57,931 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-10-29 09:45:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:57,931 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-29 09:45:57,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:45:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-29 09:45:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 09:45:57,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:57,933 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:57,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:45:57,933 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash -178676219, now seen corresponding path program 29 times [2020-10-29 09:45:57,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:57,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079451056] [2020-10-29 09:45:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:57,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:58,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:58,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:45:58,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:58,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-29 09:45:58,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:58,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:45:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:45:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:59,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:59,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:59,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:59,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:59,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:59,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:59,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:59,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:59,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:59,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:59,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079451056] [2020-10-29 09:45:59,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:59,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:45:59,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558195522] [2020-10-29 09:45:59,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:45:59,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:59,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:45:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:45:59,067 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 33 states. [2020-10-29 09:46:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:00,952 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-29 09:46:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:46:00,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-10-29 09:46:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:00,954 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:46:00,954 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:46:00,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:46:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:46:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-29 09:46:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:46:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-29 09:46:00,962 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-10-29 09:46:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:00,963 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-29 09:46:00,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:46:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-29 09:46:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 09:46:00,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:00,964 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:00,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:46:00,964 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1759670749, now seen corresponding path program 30 times [2020-10-29 09:46:00,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:00,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894693799] [2020-10-29 09:46:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:00,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:01,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:01,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 09:46:01,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-29 09:46:01,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:01,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:01,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:46:01,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:01,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 09:46:01,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:02,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:02,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:02,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:02,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:02,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:46:02,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:02,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:02,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:02,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894693799] [2020-10-29 09:46:02,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:02,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:46:02,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769782013] [2020-10-29 09:46:02,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:46:02,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:46:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:46:02,305 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 34 states. [2020-10-29 09:46:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:04,086 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-29 09:46:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:46:04,087 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-29 09:46:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:04,088 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:46:04,088 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:46:04,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:46:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:46:04,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-29 09:46:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:46:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-29 09:46:04,094 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-10-29 09:46:04,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:04,094 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-29 09:46:04,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:46:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-29 09:46:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 09:46:04,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:04,095 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:04,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:46:04,095 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:04,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:04,096 INFO L82 PathProgramCache]: Analyzing trace with hash -676991295, now seen corresponding path program 31 times [2020-10-29 09:46:04,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:04,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646720847] [2020-10-29 09:46:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:04,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:04,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:04,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 09:46:04,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:04,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-29 09:46:04,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:04,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:46:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:46:04,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:05,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:05,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:05,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:05,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:05,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:05,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:05,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:05,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:05,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646720847] [2020-10-29 09:46:05,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:05,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:46:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158109458] [2020-10-29 09:46:05,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:46:05,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:46:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:46:05,294 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 35 states. [2020-10-29 09:46:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:07,075 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-29 09:46:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:46:07,075 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-10-29 09:46:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:07,077 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:46:07,077 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:46:07,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:46:07,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:46:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-29 09:46:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:46:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-29 09:46:07,086 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-10-29 09:46:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:07,086 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-29 09:46:07,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:46:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-29 09:46:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 09:46:07,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:07,087 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:07,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:46:07,087 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:07,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash 395878367, now seen corresponding path program 32 times [2020-10-29 09:46:07,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:07,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544281016] [2020-10-29 09:46:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:07,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:07,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:07,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 09:46:07,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-29 09:46:07,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:07,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:07,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:46:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:46:07,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:08,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:08,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:08,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:08,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:08,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:08,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:08,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:08,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:08,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544281016] [2020-10-29 09:46:08,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:08,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:46:08,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351126921] [2020-10-29 09:46:08,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:46:08,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:08,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:46:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:46:08,315 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 36 states. [2020-10-29 09:46:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:10,263 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-29 09:46:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:46:10,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 77 [2020-10-29 09:46:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:10,265 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:46:10,265 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:46:10,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:46:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:46:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-29 09:46:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 09:46:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-10-29 09:46:10,272 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-10-29 09:46:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:10,272 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-10-29 09:46:10,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:46:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-10-29 09:46:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 09:46:10,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:10,273 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:10,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:46:10,274 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:10,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:10,274 INFO L82 PathProgramCache]: Analyzing trace with hash 631472509, now seen corresponding path program 33 times [2020-10-29 09:46:10,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:10,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506873090] [2020-10-29 09:46:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:10,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:10,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:10,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 09:46:10,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:10,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-29 09:46:10,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:10,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:46:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:10,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 09:46:10,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:11,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:11,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:11,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:11,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:11,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:11,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:11,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:11,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:11,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:11,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506873090] [2020-10-29 09:46:11,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:11,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:46:11,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822395880] [2020-10-29 09:46:11,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:46:11,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:11,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:46:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:46:11,641 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 37 states. [2020-10-29 09:46:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:13,717 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-29 09:46:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:46:13,718 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-10-29 09:46:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:13,719 INFO L225 Difference]: With dead ends: 90 [2020-10-29 09:46:13,719 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:46:13,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:46:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:46:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-29 09:46:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:46:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-10-29 09:46:13,724 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-10-29 09:46:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:13,725 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-10-29 09:46:13,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:46:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-10-29 09:46:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 09:46:13,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:13,725 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:13,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:46:13,726 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:13,726 INFO L82 PathProgramCache]: Analyzing trace with hash -595823717, now seen corresponding path program 34 times [2020-10-29 09:46:13,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:13,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797286262] [2020-10-29 09:46:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:13,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:14,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:14,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 09:46:14,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:14,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-29 09:46:14,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:14,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:14,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:46:14,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:14,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 09:46:14,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:15,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:15,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:15,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:15,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:15,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:15,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:15,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:15,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:15,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797286262] [2020-10-29 09:46:15,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:15,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:46:15,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657166532] [2020-10-29 09:46:15,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:46:15,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:15,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:46:15,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:46:15,105 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 38 states. [2020-10-29 09:46:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:17,297 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-29 09:46:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:46:17,297 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 81 [2020-10-29 09:46:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:17,299 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:46:17,299 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:46:17,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:46:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:46:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-29 09:46:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:46:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-10-29 09:46:17,306 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-10-29 09:46:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:17,307 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-10-29 09:46:17,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:46:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-10-29 09:46:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 09:46:17,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:17,308 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:17,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:46:17,308 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:17,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1088509497, now seen corresponding path program 35 times [2020-10-29 09:46:17,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:17,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445774833] [2020-10-29 09:46:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:17,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:17,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:17,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 09:46:17,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:17,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-29 09:46:17,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:17,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:46:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 09:46:17,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:18,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:18,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:18,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:18,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:18,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:18,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:46:18,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:18,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:18,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445774833] [2020-10-29 09:46:18,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:18,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:46:18,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349998735] [2020-10-29 09:46:18,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:46:18,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:46:18,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:46:18,728 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 39 states. [2020-10-29 09:46:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:20,982 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-29 09:46:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:46:20,982 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-10-29 09:46:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:20,983 INFO L225 Difference]: With dead ends: 94 [2020-10-29 09:46:20,983 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:46:20,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:46:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:46:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-29 09:46:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:46:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-29 09:46:20,990 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-10-29 09:46:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:20,991 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-29 09:46:20,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:46:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-29 09:46:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 09:46:20,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:20,992 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:20,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:46:20,992 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash 530057559, now seen corresponding path program 36 times [2020-10-29 09:46:20,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:20,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435944924] [2020-10-29 09:46:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:21,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:21,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:21,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 09:46:21,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:21,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-29 09:46:21,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:21,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:21,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:46:21,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:21,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 09:46:21,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:22,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:22,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:22,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:22,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:22,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:22,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:22,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:22,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:22,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:22,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:22,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:22,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:22,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435944924] [2020-10-29 09:46:22,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:22,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:46:22,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600725430] [2020-10-29 09:46:22,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:46:22,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:22,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:46:22,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:46:22,398 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 40 states. [2020-10-29 09:46:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:24,612 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-29 09:46:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:46:24,618 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 85 [2020-10-29 09:46:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:24,619 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:46:24,619 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:46:24,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:46:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:46:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-29 09:46:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 09:46:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-29 09:46:24,628 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2020-10-29 09:46:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:24,629 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-29 09:46:24,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:46:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-29 09:46:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 09:46:24,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:24,630 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:24,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:46:24,630 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash 728657141, now seen corresponding path program 37 times [2020-10-29 09:46:24,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:24,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461615103] [2020-10-29 09:46:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:24,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:24,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:24,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 09:46:24,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:24,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-29 09:46:24,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:24,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:24,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:46:24,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:24,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 09:46:24,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:26,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:26,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:26,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:26,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:26,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:26,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:26,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:26,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461615103] [2020-10-29 09:46:26,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:26,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:46:26,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880208921] [2020-10-29 09:46:26,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:46:26,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:26,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:46:26,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:46:26,113 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 41 states. [2020-10-29 09:46:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:28,634 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-29 09:46:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:46:28,635 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2020-10-29 09:46:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:28,644 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:46:28,644 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:46:28,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:46:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:46:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-29 09:46:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 09:46:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-10-29 09:46:28,652 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2020-10-29 09:46:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:28,653 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-10-29 09:46:28,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:46:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-10-29 09:46:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 09:46:28,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:28,654 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:28,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:46:28,654 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:28,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1690672877, now seen corresponding path program 38 times [2020-10-29 09:46:28,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:28,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774507272] [2020-10-29 09:46:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:28,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:29,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 09:46:29,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:30,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:30,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:30,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:30,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:30,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:46:30,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:30,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:30,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:30,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774507272] [2020-10-29 09:46:30,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:30,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:46:30,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280740966] [2020-10-29 09:46:30,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:46:30,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:30,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:46:30,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:46:30,314 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 42 states. [2020-10-29 09:46:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:33,079 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-29 09:46:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:46:33,080 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 89 [2020-10-29 09:46:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:33,081 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:46:33,082 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:46:33,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:46:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:46:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-29 09:46:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 09:46:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-10-29 09:46:33,090 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2020-10-29 09:46:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:33,090 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-10-29 09:46:33,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:46:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-10-29 09:46:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-29 09:46:33,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:33,091 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:33,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:46:33,092 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:33,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1205454257, now seen corresponding path program 39 times [2020-10-29 09:46:33,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:33,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226268664] [2020-10-29 09:46:33,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:33,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:33,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 09:46:33,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:34,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:34,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:34,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:34,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:34,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:34,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:34,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:34,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:34,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:34,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226268664] [2020-10-29 09:46:34,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:34,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:46:34,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790414092] [2020-10-29 09:46:34,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:46:34,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:46:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:46:34,683 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 43 states. [2020-10-29 09:46:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:37,406 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-29 09:46:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:46:37,407 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-10-29 09:46:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:37,408 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:46:37,408 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:46:37,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:46:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:46:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-29 09:46:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:46:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-10-29 09:46:37,418 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2020-10-29 09:46:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:37,418 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-10-29 09:46:37,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:46:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-10-29 09:46:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-29 09:46:37,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:37,419 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:37,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:46:37,419 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:37,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1244822223, now seen corresponding path program 40 times [2020-10-29 09:46:37,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:37,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973926820] [2020-10-29 09:46:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:37,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:37,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 09:46:37,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-29 09:46:37,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:37,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:46:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 09:46:37,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:39,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:39,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:39,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:39,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:39,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:39,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:39,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:39,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:39,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:39,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:39,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973926820] [2020-10-29 09:46:39,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:39,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:46:39,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049960272] [2020-10-29 09:46:39,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:46:39,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:39,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:46:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:46:39,130 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 44 states. [2020-10-29 09:46:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:42,055 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-29 09:46:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:46:42,056 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 93 [2020-10-29 09:46:42,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:42,057 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:46:42,057 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:46:42,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:46:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:46:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-29 09:46:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:46:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-29 09:46:42,064 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2020-10-29 09:46:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:42,064 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-29 09:46:42,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:46:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-29 09:46:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 09:46:42,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:42,065 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:42,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:46:42,065 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:42,066 INFO L82 PathProgramCache]: Analyzing trace with hash 422731885, now seen corresponding path program 41 times [2020-10-29 09:46:42,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:42,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950882208] [2020-10-29 09:46:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:42,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:42,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 09:46:42,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:43,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:43,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:43,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:43,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:43,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:43,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:43,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:43,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:43,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:43,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:43,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:43,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950882208] [2020-10-29 09:46:43,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:43,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:46:43,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083420779] [2020-10-29 09:46:43,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:46:43,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:43,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:46:43,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:46:43,924 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 45 states. [2020-10-29 09:46:46,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:46,986 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-29 09:46:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:46:46,987 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-10-29 09:46:46,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:46,988 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:46:46,988 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:46:46,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:46:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:46:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-29 09:46:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 09:46:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-29 09:46:46,996 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2020-10-29 09:46:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:46,996 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-29 09:46:46,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:46:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-29 09:46:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 09:46:46,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:46,997 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:46,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:46:46,997 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 667899531, now seen corresponding path program 42 times [2020-10-29 09:46:46,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:46,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639378967] [2020-10-29 09:46:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:47,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:47,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:47,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 09:46:47,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-29 09:46:47,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:47,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:46:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 09:46:47,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:48,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:48,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:48,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:48,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:48,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:48,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:48,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:48,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:48,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:48,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639378967] [2020-10-29 09:46:48,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:48,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:46:48,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712215695] [2020-10-29 09:46:48,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:46:48,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:48,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:46:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:46:48,935 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 46 states. [2020-10-29 09:46:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:52,099 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-29 09:46:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:46:52,100 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 97 [2020-10-29 09:46:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:52,101 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:46:52,101 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 09:46:52,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:46:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 09:46:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-29 09:46:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 09:46:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-10-29 09:46:52,110 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2020-10-29 09:46:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:52,110 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-10-29 09:46:52,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:46:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-10-29 09:46:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 09:46:52,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:52,111 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:52,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:46:52,111 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash 50806057, now seen corresponding path program 43 times [2020-10-29 09:46:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:52,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230327082] [2020-10-29 09:46:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:52,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:52,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 09:46:52,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-29 09:46:52,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:52,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:46:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 09:46:52,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:54,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:54,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:54,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:54,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:54,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:54,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:54,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:54,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:54,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230327082] [2020-10-29 09:46:54,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:54,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:46:54,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171764355] [2020-10-29 09:46:54,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:46:54,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:54,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:46:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:46:54,105 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 47 states. [2020-10-29 09:46:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:57,363 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-29 09:46:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:46:57,363 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 99 [2020-10-29 09:46:57,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:57,365 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:46:57,365 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:46:57,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:46:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:46:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-29 09:46:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 09:46:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-10-29 09:46:57,371 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2020-10-29 09:46:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:57,372 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-10-29 09:46:57,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:46:57,372 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-10-29 09:46:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 09:46:57,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:57,373 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:57,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:46:57,373 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:57,374 INFO L82 PathProgramCache]: Analyzing trace with hash -270535609, now seen corresponding path program 44 times [2020-10-29 09:46:57,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:57,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462535319] [2020-10-29 09:46:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:57,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:57,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 09:46:57,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:59,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:59,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:59,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:59,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:59,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:59,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:46:59,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:59,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:59,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:59,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:59,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:59,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:59,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462535319] [2020-10-29 09:46:59,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:59,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:46:59,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230574368] [2020-10-29 09:46:59,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:46:59,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:46:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:46:59,486 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 48 states. [2020-10-29 09:47:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:02,915 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-29 09:47:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:47:02,915 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 101 [2020-10-29 09:47:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:02,917 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:47:02,917 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:47:02,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:47:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:47:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-29 09:47:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:47:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-10-29 09:47:02,924 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2020-10-29 09:47:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:02,924 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-10-29 09:47:02,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:47:02,924 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-10-29 09:47:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-29 09:47:02,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:02,925 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:02,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:47:02,925 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:02,926 INFO L82 PathProgramCache]: Analyzing trace with hash 157768677, now seen corresponding path program 45 times [2020-10-29 09:47:02,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:02,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176943745] [2020-10-29 09:47:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:02,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:03,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:03,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-29 09:47:03,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:03,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-29 09:47:03,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:03,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:47:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-29 09:47:03,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:05,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:05,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:05,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:05,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:05,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:05,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:05,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:05,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:05,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:05,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176943745] [2020-10-29 09:47:05,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:05,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:47:05,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720185652] [2020-10-29 09:47:05,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:47:05,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:47:05,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:47:05,055 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 49 states. [2020-10-29 09:47:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:08,427 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-29 09:47:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:47:08,432 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 103 [2020-10-29 09:47:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:08,433 INFO L225 Difference]: With dead ends: 114 [2020-10-29 09:47:08,434 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:47:08,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:47:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:47:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-29 09:47:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 09:47:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-10-29 09:47:08,441 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2020-10-29 09:47:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:08,442 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-10-29 09:47:08,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:47:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-10-29 09:47:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-29 09:47:08,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:08,443 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:08,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:47:08,443 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash -558672893, now seen corresponding path program 46 times [2020-10-29 09:47:08,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:08,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440698825] [2020-10-29 09:47:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:08,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:08,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-29 09:47:08,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:08,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-29 09:47:08,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:08,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:08,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:47:08,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:08,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-29 09:47:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:10,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:10,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:10,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:10,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:10,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:10,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:10,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:10,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:10,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:10,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:10,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:10,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440698825] [2020-10-29 09:47:10,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:10,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 09:47:10,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625699124] [2020-10-29 09:47:10,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 09:47:10,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:10,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 09:47:10,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:47:10,643 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 50 states. [2020-10-29 09:47:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:14,239 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-29 09:47:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 09:47:14,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 105 [2020-10-29 09:47:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:14,240 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:47:14,241 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:47:14,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-29 09:47:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:47:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-29 09:47:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-29 09:47:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-29 09:47:14,248 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2020-10-29 09:47:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:14,249 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-29 09:47:14,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-29 09:47:14,249 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-29 09:47:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-29 09:47:14,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:14,250 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:14,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:47:14,250 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:14,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1864254303, now seen corresponding path program 47 times [2020-10-29 09:47:14,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:14,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450150377] [2020-10-29 09:47:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:14,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:14,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:14,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 09:47:14,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-29 09:47:14,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:14,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-29 09:47:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 09:47:14,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:16,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:16,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:16,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:16,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:16,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:16,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:16,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:16,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:16,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450150377] [2020-10-29 09:47:16,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:16,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-29 09:47:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781924811] [2020-10-29 09:47:16,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-29 09:47:16,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-29 09:47:16,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:47:16,625 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 51 states. [2020-10-29 09:47:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:20,423 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-29 09:47:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 09:47:20,423 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 107 [2020-10-29 09:47:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:20,425 INFO L225 Difference]: With dead ends: 118 [2020-10-29 09:47:20,425 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 09:47:20,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-29 09:47:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 09:47:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-29 09:47:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-29 09:47:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-10-29 09:47:20,436 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2020-10-29 09:47:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:20,436 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-10-29 09:47:20,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-29 09:47:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-10-29 09:47:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 09:47:20,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:20,437 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:20,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:47:20,437 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1897428415, now seen corresponding path program 48 times [2020-10-29 09:47:20,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:20,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312187914] [2020-10-29 09:47:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:20,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:20,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:20,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-29 09:47:20,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:20,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-29 09:47:20,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:20,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-29 09:47:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-29 09:47:20,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:22,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:22,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:22,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:22,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:22,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:22,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:22,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:22,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:22,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:22,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:22,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:22,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:22,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312187914] [2020-10-29 09:47:22,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:22,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-29 09:47:22,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747524511] [2020-10-29 09:47:22,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-29 09:47:22,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-29 09:47:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 09:47:22,881 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 52 states. [2020-10-29 09:47:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:26,725 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-29 09:47:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-29 09:47:26,726 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 109 [2020-10-29 09:47:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:26,727 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:47:26,727 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 09:47:26,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-29 09:47:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 09:47:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-29 09:47:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 09:47:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-10-29 09:47:26,735 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2020-10-29 09:47:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:26,736 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-10-29 09:47:26,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-29 09:47:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-10-29 09:47:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 09:47:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:26,737 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:26,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:47:26,737 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash 512057181, now seen corresponding path program 49 times [2020-10-29 09:47:26,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:26,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223151946] [2020-10-29 09:47:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:26,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:27,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:27,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 09:47:27,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:27,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-29 09:47:27,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:27,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:27,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-29 09:47:27,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:27,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-29 09:47:27,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:29,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:29,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:29,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:29,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:29,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:29,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:29,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:29,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:29,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:29,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:29,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:29,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223151946] [2020-10-29 09:47:29,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:29,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 09:47:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121622395] [2020-10-29 09:47:29,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 09:47:29,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:29,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 09:47:29,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:47:29,166 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 53 states. [2020-10-29 09:47:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:33,133 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-29 09:47:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-29 09:47:33,134 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 111 [2020-10-29 09:47:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:33,135 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:47:33,135 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:47:33,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-29 09:47:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:47:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-29 09:47:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-29 09:47:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2020-10-29 09:47:33,143 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2020-10-29 09:47:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:33,144 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2020-10-29 09:47:33,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-29 09:47:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2020-10-29 09:47:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-29 09:47:33,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:33,145 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:33,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:47:33,145 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash 610163067, now seen corresponding path program 50 times [2020-10-29 09:47:33,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:33,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053991370] [2020-10-29 09:47:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:33,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:33,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:33,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-29 09:47:33,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:33,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-29 09:47:33,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:33,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:33,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-29 09:47:33,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:33,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 09:47:33,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:35,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:35,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:35,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053991370] [2020-10-29 09:47:35,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:35,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-29 09:47:35,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014421445] [2020-10-29 09:47:35,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-29 09:47:35,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-29 09:47:35,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 09:47:35,717 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 54 states. [2020-10-29 09:47:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:39,825 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-29 09:47:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-29 09:47:39,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 113 [2020-10-29 09:47:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:39,827 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:47:39,828 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:47:39,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-29 09:47:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:47:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-29 09:47:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-29 09:47:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-10-29 09:47:39,836 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2020-10-29 09:47:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:39,837 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-10-29 09:47:39,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-29 09:47:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-10-29 09:47:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-29 09:47:39,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:39,838 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:39,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:47:39,838 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:39,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:39,839 INFO L82 PathProgramCache]: Analyzing trace with hash 400639001, now seen corresponding path program 51 times [2020-10-29 09:47:39,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:39,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466396665] [2020-10-29 09:47:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:39,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:40,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:40,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 09:47:40,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:40,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-29 09:47:40,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:40,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:40,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-29 09:47:40,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:40,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 09:47:40,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:42,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:42,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:42,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:42,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:42,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:42,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:42,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:42,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:42,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:42,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:42,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:42,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466396665] [2020-10-29 09:47:42,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:42,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-29 09:47:42,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556239779] [2020-10-29 09:47:42,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-29 09:47:42,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-29 09:47:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:47:42,487 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 55 states. [2020-10-29 09:47:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:46,759 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-29 09:47:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-29 09:47:46,760 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 115 [2020-10-29 09:47:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:46,762 INFO L225 Difference]: With dead ends: 126 [2020-10-29 09:47:46,762 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 09:47:46,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-29 09:47:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 09:47:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-29 09:47:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 09:47:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-29 09:47:46,768 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2020-10-29 09:47:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:46,769 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-29 09:47:46,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-29 09:47:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-29 09:47:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 09:47:46,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:46,770 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:46,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:47:46,770 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:46,770 INFO L82 PathProgramCache]: Analyzing trace with hash 911474487, now seen corresponding path program 52 times [2020-10-29 09:47:46,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:46,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912159639] [2020-10-29 09:47:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:47,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:47,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-29 09:47:47,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:47,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-29 09:47:47,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:47,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:47,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-29 09:47:47,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:47,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 09:47:47,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:49,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:49,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:49,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:49,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:49,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:49,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:49,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:49,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:49,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912159639] [2020-10-29 09:47:49,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:49,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-29 09:47:49,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419200189] [2020-10-29 09:47:49,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-29 09:47:49,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:49,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-29 09:47:49,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 09:47:49,552 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 56 states. [2020-10-29 09:47:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:53,914 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-29 09:47:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-29 09:47:53,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 117 [2020-10-29 09:47:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:53,916 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:47:53,916 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 09:47:53,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-29 09:47:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 09:47:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-29 09:47:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-29 09:47:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-10-29 09:47:53,924 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2020-10-29 09:47:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:53,924 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-10-29 09:47:53,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-29 09:47:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-10-29 09:47:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-29 09:47:53,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:53,925 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:53,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:47:53,925 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2096862507, now seen corresponding path program 53 times [2020-10-29 09:47:53,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:53,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963808765] [2020-10-29 09:47:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:54,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:54,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-29 09:47:54,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:54,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-29 09:47:54,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:54,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:54,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-29 09:47:54,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:54,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 09:47:54,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:56,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:56,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:56,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:56,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:56,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:56,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:47:56,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:56,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:56,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:56,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:56,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963808765] [2020-10-29 09:47:56,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:56,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-29 09:47:56,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38602347] [2020-10-29 09:47:56,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-29 09:47:56,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:56,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-29 09:47:56,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:47:56,783 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 57 states. [2020-10-29 09:48:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:01,256 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-29 09:48:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-29 09:48:01,257 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 119 [2020-10-29 09:48:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:01,258 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:48:01,258 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:48:01,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-29 09:48:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:48:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-29 09:48:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:48:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-10-29 09:48:01,264 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2020-10-29 09:48:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:01,264 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-10-29 09:48:01,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-29 09:48:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-10-29 09:48:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-29 09:48:01,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:01,265 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:01,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:48:01,266 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:01,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1699243763, now seen corresponding path program 54 times [2020-10-29 09:48:01,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:01,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164684316] [2020-10-29 09:48:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:01,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:01,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-29 09:48:01,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:01,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 09:48:01,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:04,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:04,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:04,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:04,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:04,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:04,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:04,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:04,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:04,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:04,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:04,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:04,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:04,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164684316] [2020-10-29 09:48:04,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:04,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-29 09:48:04,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187523471] [2020-10-29 09:48:04,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-29 09:48:04,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-29 09:48:04,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-29 09:48:04,193 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 58 states. [2020-10-29 09:48:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:08,698 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-29 09:48:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-29 09:48:08,699 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 121 [2020-10-29 09:48:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:08,700 INFO L225 Difference]: With dead ends: 132 [2020-10-29 09:48:08,701 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:48:08,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-29 09:48:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:48:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-29 09:48:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:48:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2020-10-29 09:48:08,711 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2020-10-29 09:48:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:08,711 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2020-10-29 09:48:08,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-29 09:48:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2020-10-29 09:48:08,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 09:48:08,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:08,712 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:08,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:48:08,713 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:08,713 INFO L82 PathProgramCache]: Analyzing trace with hash -964832367, now seen corresponding path program 55 times [2020-10-29 09:48:08,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:08,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997819813] [2020-10-29 09:48:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:08,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:09,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 09:48:09,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:11,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:11,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:11,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:11,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:11,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:48:11,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:11,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:11,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:11,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:11,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:11,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:11,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997819813] [2020-10-29 09:48:11,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:11,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-29 09:48:11,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207418136] [2020-10-29 09:48:11,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-29 09:48:11,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:11,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-29 09:48:11,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:48:11,775 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 59 states. [2020-10-29 09:48:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:16,586 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-29 09:48:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-29 09:48:16,587 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 123 [2020-10-29 09:48:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:16,588 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:48:16,588 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:48:16,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-29 09:48:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:48:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-29 09:48:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-29 09:48:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-10-29 09:48:16,596 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2020-10-29 09:48:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:16,597 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-10-29 09:48:16,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-29 09:48:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-10-29 09:48:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-29 09:48:16,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:16,598 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:16,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:48:16,598 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1341484881, now seen corresponding path program 56 times [2020-10-29 09:48:16,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:16,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117051312] [2020-10-29 09:48:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:16,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-29 09:48:17,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:19,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:19,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:19,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:19,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:19,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:19,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:19,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:19,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:19,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:19,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117051312] [2020-10-29 09:48:19,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:19,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-29 09:48:19,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397318077] [2020-10-29 09:48:19,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-29 09:48:19,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:19,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-29 09:48:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-29 09:48:19,800 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 60 states. [2020-10-29 09:48:24,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:24,500 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-29 09:48:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-29 09:48:24,501 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 125 [2020-10-29 09:48:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:24,502 INFO L225 Difference]: With dead ends: 136 [2020-10-29 09:48:24,502 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:48:24,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2020-10-29 09:48:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:48:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-29 09:48:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 09:48:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-10-29 09:48:24,511 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2020-10-29 09:48:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:24,511 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-10-29 09:48:24,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-29 09:48:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-10-29 09:48:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-29 09:48:24,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:24,512 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:24,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:48:24,513 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1767669325, now seen corresponding path program 57 times [2020-10-29 09:48:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:24,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041965253] [2020-10-29 09:48:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:25,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:25,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-29 09:48:25,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:25,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-29 09:48:25,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:25,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:25,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-29 09:48:25,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:25,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-29 09:48:25,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:27,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:27,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:27,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:27,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:27,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:48:27,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:27,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:27,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:27,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:27,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:27,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:27,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041965253] [2020-10-29 09:48:27,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:27,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-29 09:48:27,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310290791] [2020-10-29 09:48:27,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-29 09:48:27,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:27,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-29 09:48:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:48:27,804 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 61 states. [2020-10-29 09:48:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:32,902 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-29 09:48:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-29 09:48:32,903 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 127 [2020-10-29 09:48:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:32,904 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:48:32,904 INFO L226 Difference]: Without dead ends: 131 [2020-10-29 09:48:32,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2020-10-29 09:48:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-29 09:48:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-29 09:48:32,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-29 09:48:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2020-10-29 09:48:32,911 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2020-10-29 09:48:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:32,911 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2020-10-29 09:48:32,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-29 09:48:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2020-10-29 09:48:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 09:48:32,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:32,912 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:32,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-29 09:48:32,912 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:32,912 INFO L82 PathProgramCache]: Analyzing trace with hash 367623275, now seen corresponding path program 58 times [2020-10-29 09:48:32,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:32,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694645742] [2020-10-29 09:48:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:32,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:33,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:33,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-29 09:48:33,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:33,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-29 09:48:33,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:33,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:33,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-29 09:48:33,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:33,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-29 09:48:33,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:36,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:36,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:36,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:36,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:36,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:36,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:48:36,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:36,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:36,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:36,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:36,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:36,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:36,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694645742] [2020-10-29 09:48:36,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:36,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-29 09:48:36,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129909803] [2020-10-29 09:48:36,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-29 09:48:36,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-29 09:48:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-29 09:48:36,355 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 62 states. [2020-10-29 09:48:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:41,446 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-29 09:48:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-29 09:48:41,447 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 129 [2020-10-29 09:48:41,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:41,449 INFO L225 Difference]: With dead ends: 140 [2020-10-29 09:48:41,449 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:48:41,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2020-10-29 09:48:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:48:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-29 09:48:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-29 09:48:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-10-29 09:48:41,458 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2020-10-29 09:48:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:41,458 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-10-29 09:48:41,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-29 09:48:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-10-29 09:48:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-29 09:48:41,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:41,459 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:41,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-29 09:48:41,459 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:41,460 INFO L82 PathProgramCache]: Analyzing trace with hash -751867127, now seen corresponding path program 59 times [2020-10-29 09:48:41,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:41,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102471645] [2020-10-29 09:48:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:42,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:42,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-29 09:48:42,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:42,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-29 09:48:42,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:42,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-29 09:48:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-29 09:48:42,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:45,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:45,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:45,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:45,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:45,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:48:45,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:45,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:45,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:45,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:45,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102471645] [2020-10-29 09:48:45,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:45,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-29 09:48:45,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24327464] [2020-10-29 09:48:45,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-29 09:48:45,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:45,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-29 09:48:45,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:48:45,199 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 63 states. [2020-10-29 09:48:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:50,673 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-10-29 09:48:50,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-29 09:48:50,674 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 131 [2020-10-29 09:48:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:50,675 INFO L225 Difference]: With dead ends: 142 [2020-10-29 09:48:50,675 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 09:48:50,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2020-10-29 09:48:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 09:48:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-29 09:48:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-29 09:48:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2020-10-29 09:48:50,684 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2020-10-29 09:48:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:50,684 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2020-10-29 09:48:50,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-29 09:48:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2020-10-29 09:48:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-29 09:48:50,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:50,685 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:50,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-29 09:48:50,685 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:50,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1454647847, now seen corresponding path program 60 times [2020-10-29 09:48:50,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:50,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106603629] [2020-10-29 09:48:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:51,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:51,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-29 09:48:51,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:51,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-29 09:48:51,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:51,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:51,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-29 09:48:51,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:51,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-29 09:48:51,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:54,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:54,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:54,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:54,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:54,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:54,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:48:54,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:54,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:54,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:54,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:54,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:54,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:54,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106603629] [2020-10-29 09:48:54,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:54,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-29 09:48:54,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767916561] [2020-10-29 09:48:54,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-29 09:48:54,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:54,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-29 09:48:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-29 09:48:54,352 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 64 states. [2020-10-29 09:49:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:00,058 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-10-29 09:49:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-29 09:49:00,059 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 133 [2020-10-29 09:49:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:00,061 INFO L225 Difference]: With dead ends: 144 [2020-10-29 09:49:00,061 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 09:49:00,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2020-10-29 09:49:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 09:49:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-29 09:49:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:49:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2020-10-29 09:49:00,068 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2020-10-29 09:49:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:00,068 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2020-10-29 09:49:00,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-29 09:49:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2020-10-29 09:49:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-29 09:49:00,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:00,069 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:00,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-29 09:49:00,069 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:00,069 INFO L82 PathProgramCache]: Analyzing trace with hash 201693637, now seen corresponding path program 61 times [2020-10-29 09:49:00,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:00,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326019273] [2020-10-29 09:49:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:00,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:00,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-29 09:49:00,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:00,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-29 09:49:00,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:00,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:00,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-29 09:49:00,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:00,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 09:49:00,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:04,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:04,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:04,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:04,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:04,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:04,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:49:04,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:04,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:04,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:04,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326019273] [2020-10-29 09:49:04,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:04,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-29 09:49:04,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972085099] [2020-10-29 09:49:04,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-29 09:49:04,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:04,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-29 09:49:04,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:49:04,076 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 65 states. [2020-10-29 09:49:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:10,105 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-10-29 09:49:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-29 09:49:10,106 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 135 [2020-10-29 09:49:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:10,108 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:49:10,108 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:49:10,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2020-10-29 09:49:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:49:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-29 09:49:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:49:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2020-10-29 09:49:10,114 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2020-10-29 09:49:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:10,114 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2020-10-29 09:49:10,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-29 09:49:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2020-10-29 09:49:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-29 09:49:10,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:10,115 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:10,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-29 09:49:10,115 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:10,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1296459293, now seen corresponding path program 62 times [2020-10-29 09:49:10,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:10,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287746779] [2020-10-29 09:49:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:10,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking...