/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/heap-data/shared_mem1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:34:47,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:34:47,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:34:47,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:34:47,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:34:47,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:34:47,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:34:47,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:34:47,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:34:47,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:34:47,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:34:47,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:34:47,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:34:47,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:34:47,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:34:47,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:34:47,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:34:47,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:34:47,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:34:47,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:34:47,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:34:47,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:34:47,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:34:47,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:34:47,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:34:47,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:34:47,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:34:47,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:34:47,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:34:47,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:34:47,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:34:47,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:34:47,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:34:47,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:34:47,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:34:47,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:34:47,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:34:47,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:34:47,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:34:47,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:34:47,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:34:47,684 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 [2020-10-28 14:34:47,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:34:47,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:34:47,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:34:47,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:34:47,739 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:34:47,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:34:47,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:34:47,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:34:47,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:34:47,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:34:47,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:34:47,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:34:47,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:34:47,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:34:47,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:34:47,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:34:47,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:34:47,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:34:47,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:34:47,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:34:47,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:34:47,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:34:47,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:34:47,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:34:47,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:34:47,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:34:47,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:34:47,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:34:47,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:34:47,746 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:34:48,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:34:48,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:34:48,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:34:48,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:34:48,227 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:34:48,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-28 14:34:48,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/518b05f5e/7e2edc4c145a4c0ba71bb8887d36a6ea/FLAGa0774c758 [2020-10-28 14:34:49,043 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:34:49,044 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-28 14:34:49,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/518b05f5e/7e2edc4c145a4c0ba71bb8887d36a6ea/FLAGa0774c758 [2020-10-28 14:34:49,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/518b05f5e/7e2edc4c145a4c0ba71bb8887d36a6ea [2020-10-28 14:34:49,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:34:49,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:34:49,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:34:49,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:34:49,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:34:49,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:49,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6236f41c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49, skipping insertion in model container [2020-10-28 14:34:49,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:49,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:34:49,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:34:49,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:34:49,739 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:34:49,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:34:49,882 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:34:49,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49 WrapperNode [2020-10-28 14:34:49,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:34:49,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:34:49,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:34:49,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:34:49,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:49,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:49,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:49,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:49,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:50,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:50,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (1/1) ... [2020-10-28 14:34:50,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:34:50,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:34:50,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:34:50,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:34:50,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (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 [2020-10-28 14:34:50,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:34:50,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:34:50,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:34:50,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:34:50,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:34:50,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:34:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:34:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:34:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:34:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:34:50,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:34:50,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:34:50,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:34:50,166 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:34:50,166 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:34:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:34:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:34:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:34:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:34:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:34:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:34:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:34:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:34:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:34:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:34:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:34:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:34:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:34:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:34:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:34:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:34:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:34:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:34:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:34:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:34:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:34:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:34:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:34:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:34:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:34:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:34:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:34:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:34:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:34:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:34:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:34:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:34:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:34:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:34:50,174 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:34:50,174 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:34:50,174 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:34:50,175 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:34:50,175 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:34:50,175 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:34:50,176 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:34:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:34:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:34:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:34:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:34:50,178 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:34:50,178 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:34:50,178 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:34:50,178 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:34:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:34:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:34:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:34:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:34:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:34:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:34:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:34:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:34:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:34:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:34:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:34:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:34:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:34:50,183 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:34:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:34:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:34:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:34:50,184 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:34:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:34:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:34:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:34:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:34:50,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:34:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:34:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:34:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:34:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:34:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:34:50,188 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:34:50,188 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:34:50,188 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:34:50,188 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:34:50,189 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:34:50,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:34:50,189 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:34:50,189 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:34:50,189 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:34:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:34:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:34:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:34:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:34:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:34:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:34:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:34:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:34:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:34:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:34:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:34:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:34:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:34:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:34:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:34:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:34:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:34:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:34:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:34:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:34:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:34:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:34:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:34:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:34:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:34:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:34:51,078 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:34:51,079 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:34:51,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:34:51 BoogieIcfgContainer [2020-10-28 14:34:51,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:34:51,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:34:51,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:34:51,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:34:51,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:34:49" (1/3) ... [2020-10-28 14:34:51,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a47b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:34:51, skipping insertion in model container [2020-10-28 14:34:51,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:34:49" (2/3) ... [2020-10-28 14:34:51,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a47b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:34:51, skipping insertion in model container [2020-10-28 14:34:51,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:34:51" (3/3) ... [2020-10-28 14:34:51,090 INFO L111 eAbstractionObserver]: Analyzing ICFG shared_mem1.i [2020-10-28 14:34:51,103 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:34:51,108 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:34:51,123 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:34:51,151 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:34:51,151 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:34:51,151 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:34:51,151 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:34:51,152 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:34:51,152 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:34:51,152 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:34:51,152 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:34:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 14:34:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:34:51,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:51,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:51,177 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash 270174809, now seen corresponding path program 1 times [2020-10-28 14:34:51,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:51,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83236076] [2020-10-28 14:34:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:51,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:51,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:52,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:34:52,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:52,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-28 14:34:52,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:52,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:34:52,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:52,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:34:52,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:52,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:52,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:52,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:52,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:34:52,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:52,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:52,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:52,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:52,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:52,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:52,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83236076] [2020-10-28 14:34:52,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:52,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:34:52,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471860016] [2020-10-28 14:34:52,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:34:52,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:34:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:34:52,219 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-28 14:34:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:52,313 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-10-28 14:34:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:34:52,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 14:34:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:52,324 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:34:52,324 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:34:52,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:34:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:34:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:34:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:34:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-28 14:34:52,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 16 [2020-10-28 14:34:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:52,368 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-28 14:34:52,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:34:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-28 14:34:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:34:52,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:52,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:52,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:34:52,370 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:52,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1458860047, now seen corresponding path program 1 times [2020-10-28 14:34:52,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:52,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378580450] [2020-10-28 14:34:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:52,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:52,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:34:52,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:52,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-28 14:34:52,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:52,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:52,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:34:52,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:52,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:34:52,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:52,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:52,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:52,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:52,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:52,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:34:52,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:52,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:52,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:52,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378580450] [2020-10-28 14:34:52,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:52,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:34:52,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080663456] [2020-10-28 14:34:52,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:34:52,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:34:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:34:52,878 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 7 states. [2020-10-28 14:34:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:53,179 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-28 14:34:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:53,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-28 14:34:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:53,183 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:34:53,183 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:34:53,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:34:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-28 14:34:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:34:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-28 14:34:53,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 17 [2020-10-28 14:34:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:53,194 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-28 14:34:53,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:34:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-28 14:34:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:34:53,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:53,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:53,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:34:53,196 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1457013005, now seen corresponding path program 1 times [2020-10-28 14:34:53,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:53,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003311943] [2020-10-28 14:34:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:53,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:53,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:53,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:34:53,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:53,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-28 14:34:53,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:53,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:34:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:34:53,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:53,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:53,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:53,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:53,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:53,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:34:53,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:53,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:53,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:53,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003311943] [2020-10-28 14:34:53,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:53,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:34:53,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709779501] [2020-10-28 14:34:53,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:34:53,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:53,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:34:53,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:34:53,791 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 7 states. [2020-10-28 14:34:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:54,198 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-28 14:34:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:54,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-28 14:34:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:54,200 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:34:54,201 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:34:54,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:34:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-28 14:34:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:34:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-28 14:34:54,209 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2020-10-28 14:34:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:54,210 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-28 14:34:54,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:34:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-28 14:34:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:34:54,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:54,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:54,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:34:54,211 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:54,212 INFO L82 PathProgramCache]: Analyzing trace with hash 317994357, now seen corresponding path program 1 times [2020-10-28 14:34:54,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:54,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352304477] [2020-10-28 14:34:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:54,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:34:54,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:34:54,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-28 14:34:54,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:34:54,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:54,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:34:54,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:54,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:54,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:54,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:54,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:34:54,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:54,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:54,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:54,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:54,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352304477] [2020-10-28 14:34:54,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:54,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:34:54,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675031125] [2020-10-28 14:34:54,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:34:54,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:54,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:34:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:34:54,938 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 7 states. [2020-10-28 14:34:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:55,194 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-28 14:34:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:55,195 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-28 14:34:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:55,196 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:34:55,196 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:34:55,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:34:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-28 14:34:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:34:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-28 14:34:55,203 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2020-10-28 14:34:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:55,203 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-28 14:34:55,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:34:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-28 14:34:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:34:55,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:55,204 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:55,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:34:55,204 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1676333536, now seen corresponding path program 1 times [2020-10-28 14:34:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:55,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950146240] [2020-10-28 14:34:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:55,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:55,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:55,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:34:55,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:55,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-28 14:34:55,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:55,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:55,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:55,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:55,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:34:55,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:34:55,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:55,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:55,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:55,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:55,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:55,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:34:55,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:55,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:55,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:55,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950146240] [2020-10-28 14:34:55,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:55,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:34:55,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590476756] [2020-10-28 14:34:55,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:34:55,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:55,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:34:55,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:34:55,887 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2020-10-28 14:34:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:56,069 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-28 14:34:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:56,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 14:34:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:56,071 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:34:56,071 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:34:56,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:34:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-28 14:34:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:34:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-28 14:34:56,082 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 20 [2020-10-28 14:34:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:56,082 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-28 14:34:56,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:34:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-28 14:34:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:34:56,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:56,083 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:56,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:34:56,084 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1674486494, now seen corresponding path program 1 times [2020-10-28 14:34:56,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:56,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219509705] [2020-10-28 14:34:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:56,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:56,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:57,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:34:57,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:57,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-28 14:34:57,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:57,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:57,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:57,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:34:57,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:57,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:57,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:57,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:57,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:57,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:34:57,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:57,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:57,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:57,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219509705] [2020-10-28 14:34:57,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:57,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:34:57,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987509417] [2020-10-28 14:34:57,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:34:57,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:57,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:34:57,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:34:57,222 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 8 states. [2020-10-28 14:34:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:57,445 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-28 14:34:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:57,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 14:34:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:57,450 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:34:57,450 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:34:57,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:34:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-28 14:34:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:34:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-28 14:34:57,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 20 [2020-10-28 14:34:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:57,464 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-28 14:34:57,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:34:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-28 14:34:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:34:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:57,465 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:57,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:34:57,465 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash 100520868, now seen corresponding path program 1 times [2020-10-28 14:34:57,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:57,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719154695] [2020-10-28 14:34:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:57,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:58,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:34:58,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-28 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:34:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:58,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:58,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:58,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:58,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:34:58,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:58,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:58,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:58,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719154695] [2020-10-28 14:34:58,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:58,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:34:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962756277] [2020-10-28 14:34:58,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:34:58,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:34:58,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:34:58,841 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 8 states. [2020-10-28 14:34:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:59,094 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-10-28 14:34:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:59,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 14:34:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:59,096 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:34:59,097 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:34:59,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:34:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-10-28 14:34:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:34:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-28 14:34:59,111 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 20 [2020-10-28 14:34:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:59,112 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-28 14:34:59,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:34:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-28 14:34:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:34:59,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:59,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:59,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:34:59,113 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1030534352, now seen corresponding path program 1 times [2020-10-28 14:34:59,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:59,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503468942] [2020-10-28 14:34:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:59,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:59,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:59,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:00,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:00,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:35:00,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:00,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-28 14:35:00,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:00,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:35:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:35:00,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:00,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:00,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:00,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:00,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:00,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:00,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:35:00,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:00,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:00,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:00,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503468942] [2020-10-28 14:35:00,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:00,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:35:00,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202928754] [2020-10-28 14:35:00,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:35:00,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:35:00,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:35:00,448 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 9 states. [2020-10-28 14:35:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:00,936 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-28 14:35:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:35:00,937 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:35:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:00,938 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:35:00,938 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:35:00,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:35:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:35:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-28 14:35:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:35:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2020-10-28 14:35:00,949 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 22 [2020-10-28 14:35:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:00,951 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2020-10-28 14:35:00,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:35:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2020-10-28 14:35:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:35:00,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:00,953 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:00,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:35:00,953 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1032381394, now seen corresponding path program 1 times [2020-10-28 14:35:00,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:00,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760523038] [2020-10-28 14:35:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:01,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:01,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:03,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:03,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:35:03,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:35:03,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2102 [2020-10-28 14:35:03,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:03,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:03,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:35:03,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:03,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:35:03,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:03,245 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-28 14:35:03,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:03,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:03,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:03,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:03,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:03,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:03,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:03,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:03,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:03,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:03,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:03,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:03,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760523038] [2020-10-28 14:35:03,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:03,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:35:03,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316422596] [2020-10-28 14:35:03,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:35:03,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:03,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:35:03,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:35:03,424 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 9 states. [2020-10-28 14:35:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:03,932 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-10-28 14:35:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:35:03,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:35:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:03,934 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:35:03,934 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:35:03,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:35:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-28 14:35:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 14:35:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-10-28 14:35:03,941 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 22 [2020-10-28 14:35:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:03,941 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-10-28 14:35:03,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:35:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-10-28 14:35:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:35:03,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:03,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:03,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:35:03,943 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1489425582, now seen corresponding path program 1 times [2020-10-28 14:35:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:03,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920607279] [2020-10-28 14:35:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:03,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:04,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:35:04,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:04,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-28 14:35:04,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:04,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:04,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:35:04,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:04,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:35:04,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:04,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:04,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:04,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:04,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:04,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:04,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:04,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:04,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:04,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:04,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:04,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:04,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920607279] [2020-10-28 14:35:04,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:04,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:35:04,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317592900] [2020-10-28 14:35:04,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:35:04,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:35:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:35:04,598 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 9 states. [2020-10-28 14:35:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:05,092 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-10-28 14:35:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:35:05,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:35:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:05,094 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:35:05,094 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:35:05,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:35:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:35:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-10-28 14:35:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:35:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-28 14:35:05,101 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2020-10-28 14:35:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:05,101 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-28 14:35:05,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:35:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-28 14:35:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:35:05,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:05,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:05,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:35:05,102 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1487578540, now seen corresponding path program 1 times [2020-10-28 14:35:05,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:05,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102242253] [2020-10-28 14:35:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:05,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:05,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:05,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:05,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:35:05,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:05,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-28 14:35:05,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:05,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:05,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:35:05,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:05,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:35:05,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:05,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:05,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:05,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:05,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:05,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:05,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:05,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:05,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:05,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:05,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:05,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:05,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:05,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102242253] [2020-10-28 14:35:05,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:05,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:35:05,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439052040] [2020-10-28 14:35:05,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:35:05,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:05,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:35:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:35:05,868 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 9 states. [2020-10-28 14:35:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:06,333 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-10-28 14:35:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:35:06,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:35:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:06,334 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:35:06,334 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:35:06,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:35:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-10-28 14:35:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:35:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-10-28 14:35:06,341 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 22 [2020-10-28 14:35:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:06,341 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-10-28 14:35:06,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:35:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-10-28 14:35:06,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:35:06,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:06,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:06,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:35:06,342 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:06,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1288699790, now seen corresponding path program 2 times [2020-10-28 14:35:06,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:06,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603955027] [2020-10-28 14:35:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:06,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:06,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:35:06,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:06,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-28 14:35:06,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:06,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:06,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:35:06,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:06,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:35:06,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:06,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:06,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:06,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:06,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:06,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:06,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:06,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:35:06,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603955027] [2020-10-28 14:35:06,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:35:06,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:35:06,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676446059] [2020-10-28 14:35:06,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:35:06,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:06,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:35:06,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:35:06,943 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 6 states. [2020-10-28 14:35:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:07,102 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-10-28 14:35:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:35:07,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 14:35:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:07,104 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:35:07,104 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:35:07,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:35:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:35:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 14:35:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:35:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-28 14:35:07,109 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2020-10-28 14:35:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:07,110 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-28 14:35:07,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:35:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-28 14:35:07,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:35:07,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:07,111 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:07,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:35:07,111 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1242981375, now seen corresponding path program 1 times [2020-10-28 14:35:07,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:07,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512117180] [2020-10-28 14:35:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:07,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:08,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:08,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:35:08,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:08,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-28 14:35:08,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:08,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:08,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:35:08,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:08,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:35:08,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:08,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:08,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:08,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:08,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:08,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:35:08,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:08,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:08,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:08,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:08,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:08,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:08,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512117180] [2020-10-28 14:35:08,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:08,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:35:08,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799371786] [2020-10-28 14:35:08,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:35:08,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:08,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:35:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:35:08,495 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 10 states. [2020-10-28 14:35:08,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:08,827 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-28 14:35:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:35:08,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-28 14:35:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:08,829 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:35:08,829 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:35:08,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:35:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:35:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-28 14:35:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:35:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-28 14:35:08,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 25 [2020-10-28 14:35:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:08,837 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-28 14:35:08,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:35:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-28 14:35:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:35:08,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:08,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:08,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:35:08,839 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1241134333, now seen corresponding path program 1 times [2020-10-28 14:35:08,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:08,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687987119] [2020-10-28 14:35:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:08,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:09,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:09,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:10,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:11,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:11,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:35:11,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:35:11,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2165 [2020-10-28 14:35:11,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:11,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:35:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:11,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:35:11,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:11,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:11,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:11,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:11,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:11,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:11,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:11,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:11,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:11,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:35:11,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687987119] [2020-10-28 14:35:11,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:11,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:35:11,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474007002] [2020-10-28 14:35:11,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:35:11,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:11,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:35:11,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:35:11,333 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 9 states. [2020-10-28 14:35:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:11,708 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2020-10-28 14:35:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:35:11,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-28 14:35:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:11,709 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:35:11,709 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:35:11,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:35:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-28 14:35:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:35:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-28 14:35:11,716 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 25 [2020-10-28 14:35:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:11,716 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-28 14:35:11,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:35:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-28 14:35:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:35:11,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:11,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:11,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:35:11,718 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:11,718 INFO L82 PathProgramCache]: Analyzing trace with hash 532025987, now seen corresponding path program 1 times [2020-10-28 14:35:11,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:11,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963932227] [2020-10-28 14:35:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:11,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:12,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:12,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:35:12,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:12,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-28 14:35:12,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:12,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:35:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:12,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:35:12,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:12,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:12,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:12,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:12,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:12,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:12,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:12,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:12,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:12,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963932227] [2020-10-28 14:35:12,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:12,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:35:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519844468] [2020-10-28 14:35:12,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:35:12,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:12,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:35:12,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:35:12,652 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 10 states. [2020-10-28 14:35:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:13,067 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-28 14:35:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:35:13,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-28 14:35:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:13,069 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:35:13,070 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:35:13,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:35:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-10-28 14:35:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:35:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2020-10-28 14:35:13,080 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 25 [2020-10-28 14:35:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:13,080 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2020-10-28 14:35:13,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:35:13,080 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-10-28 14:35:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:35:13,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:13,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:13,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:35:13,081 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:13,082 INFO L82 PathProgramCache]: Analyzing trace with hash 533873029, now seen corresponding path program 1 times [2020-10-28 14:35:13,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:13,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006561022] [2020-10-28 14:35:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:13,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:14,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:14,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:35:14,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:14,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-28 14:35:14,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:14,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:35:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:35:14,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:14,567 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-28 14:35:14,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:14,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:14,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:14,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:14,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:14,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:14,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:14,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:14,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:14,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:14,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006561022] [2020-10-28 14:35:14,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:14,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:35:14,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707125330] [2020-10-28 14:35:14,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:35:14,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:14,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:35:14,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:35:14,929 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 10 states. [2020-10-28 14:35:15,082 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-28 14:35:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:15,506 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-10-28 14:35:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:35:15,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-28 14:35:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:15,508 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:35:15,509 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:35:15,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:35:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-10-28 14:35:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:35:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-28 14:35:15,514 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2020-10-28 14:35:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:15,515 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-28 14:35:15,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:35:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-28 14:35:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:35:15,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:15,516 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:15,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:35:15,516 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash 682279761, now seen corresponding path program 2 times [2020-10-28 14:35:15,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:15,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526556791] [2020-10-28 14:35:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:17,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:17,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:35:17,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:35:17,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1901 [2020-10-28 14:35:17,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:17,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:35:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:35:17,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:17,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:17,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:17,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:17,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:17,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:17,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:17,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:17,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:17,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:35:17,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526556791] [2020-10-28 14:35:17,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:17,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:35:17,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558612689] [2020-10-28 14:35:17,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:35:17,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:17,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:35:17,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:35:17,682 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 10 states. [2020-10-28 14:35:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:18,100 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-28 14:35:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:35:18,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 14:35:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:18,101 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:35:18,101 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:35:18,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:35:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-28 14:35:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:35:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-28 14:35:18,116 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 27 [2020-10-28 14:35:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:18,117 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-28 14:35:18,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:35:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-28 14:35:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:35:18,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:18,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:18,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:35:18,118 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:18,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1837680173, now seen corresponding path program 3 times [2020-10-28 14:35:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:18,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258323156] [2020-10-28 14:35:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:18,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:19,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:19,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:35:19,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:19,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 907 [2020-10-28 14:35:19,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:19,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:19,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:35:19,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:19,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:35:19,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:19,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:19,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:19,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:19,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:19,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:19,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:19,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:19,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:19,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:19,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:19,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:19,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:19,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258323156] [2020-10-28 14:35:19,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:19,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:35:19,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841512634] [2020-10-28 14:35:19,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:35:19,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:35:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:35:19,520 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 11 states. [2020-10-28 14:35:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:20,253 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2020-10-28 14:35:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:35:20,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 14:35:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:20,255 INFO L225 Difference]: With dead ends: 86 [2020-10-28 14:35:20,255 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:35:20,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:35:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-10-28 14:35:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 14:35:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-10-28 14:35:20,275 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 27 [2020-10-28 14:35:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:20,276 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-10-28 14:35:20,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:35:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-10-28 14:35:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:35:20,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:20,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:20,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:35:20,277 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1835833131, now seen corresponding path program 2 times [2020-10-28 14:35:20,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:20,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218400636] [2020-10-28 14:35:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:20,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:20,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:20,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:21,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:21,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:35:21,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:21,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1273 [2020-10-28 14:35:21,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:21,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:21,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:35:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:35:21,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:22,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:22,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:22,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:22,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:22,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:22,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:35:22,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:22,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:22,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:22,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:22,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:22,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:22,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218400636] [2020-10-28 14:35:22,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:22,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:35:22,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306402047] [2020-10-28 14:35:22,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:35:22,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:35:22,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:35:22,204 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 11 states. [2020-10-28 14:35:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:22,737 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2020-10-28 14:35:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:35:22,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 14:35:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:22,738 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:35:22,739 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:35:22,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:22,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:35:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-28 14:35:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:35:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-10-28 14:35:22,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 27 [2020-10-28 14:35:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:22,751 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-10-28 14:35:22,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:35:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-10-28 14:35:22,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:35:22,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:22,752 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:22,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:35:22,752 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:22,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:22,752 INFO L82 PathProgramCache]: Analyzing trace with hash 942292241, now seen corresponding path program 3 times [2020-10-28 14:35:22,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:22,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100245127] [2020-10-28 14:35:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:22,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:23,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:24,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:24,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:35:24,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:24,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1430 [2020-10-28 14:35:24,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:24,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:35:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:35:24,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:24,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:24,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:24,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:24,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:24,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:24,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:24,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:24,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:24,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:24,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:24,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:24,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:24,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100245127] [2020-10-28 14:35:24,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:24,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:35:24,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305335665] [2020-10-28 14:35:24,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:35:24,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:24,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:35:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:35:24,672 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 11 states. [2020-10-28 14:35:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:25,322 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2020-10-28 14:35:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:35:25,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-28 14:35:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:25,324 INFO L225 Difference]: With dead ends: 132 [2020-10-28 14:35:25,324 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 14:35:25,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 14:35:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2020-10-28 14:35:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 14:35:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2020-10-28 14:35:25,334 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 27 [2020-10-28 14:35:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:25,334 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2020-10-28 14:35:25,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:35:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2020-10-28 14:35:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:35:25,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:25,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:25,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:35:25,335 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash 549696192, now seen corresponding path program 2 times [2020-10-28 14:35:25,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:25,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931055768] [2020-10-28 14:35:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:25,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:25,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:26,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:28,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:28,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:35:28,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:35:28,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3323 [2020-10-28 14:35:28,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:28,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:28,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:35:28,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:28,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:35:28,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:29,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:29,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:29,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:29,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:29,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:29,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:29,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:29,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:29,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:35:29,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931055768] [2020-10-28 14:35:29,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:29,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:35:29,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963296831] [2020-10-28 14:35:29,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:35:29,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:35:29,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:35:29,078 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand 11 states. [2020-10-28 14:35:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:29,406 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-10-28 14:35:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:35:29,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 14:35:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:29,407 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:35:29,407 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:35:29,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:35:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-10-28 14:35:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 14:35:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-28 14:35:29,414 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 30 [2020-10-28 14:35:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:29,415 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-28 14:35:29,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:35:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-28 14:35:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:35:29,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:29,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:29,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:35:29,416 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1970263742, now seen corresponding path program 2 times [2020-10-28 14:35:29,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:29,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518299959] [2020-10-28 14:35:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:29,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:29,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:30,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:30,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:35:30,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1448 [2020-10-28 14:35:30,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:30,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:35:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:35:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:31,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:31,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:31,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:31,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:31,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:31,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:31,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:31,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:31,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:31,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:31,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518299959] [2020-10-28 14:35:31,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:31,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:35:31,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332329454] [2020-10-28 14:35:31,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:35:31,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:35:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:31,628 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 12 states. [2020-10-28 14:35:31,909 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-28 14:35:32,268 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2020-10-28 14:35:32,423 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-28 14:35:32,614 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-28 14:35:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:33,201 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2020-10-28 14:35:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:35:33,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 14:35:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:33,206 INFO L225 Difference]: With dead ends: 119 [2020-10-28 14:35:33,206 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:35:33,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:35:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:35:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2020-10-28 14:35:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 14:35:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-10-28 14:35:33,222 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 30 [2020-10-28 14:35:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:33,223 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-10-28 14:35:33,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-10-28 14:35:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:35:33,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:33,224 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:33,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:35:33,224 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1968416700, now seen corresponding path program 2 times [2020-10-28 14:35:33,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:33,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366199590] [2020-10-28 14:35:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:33,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:33,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:34,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:35:35,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:35,484 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-28 14:35:35,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:35,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:35,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:35,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:35,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:35,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:35,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:35,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:35,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366199590] [2020-10-28 14:35:35,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:35,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:35:35,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199016818] [2020-10-28 14:35:35,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:35:35,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:35:35,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:35,774 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 12 states. [2020-10-28 14:35:36,089 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-28 14:35:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:36,876 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2020-10-28 14:35:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:35:36,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 14:35:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:36,879 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:35:36,880 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 14:35:36,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:35:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 14:35:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2020-10-28 14:35:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 14:35:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-10-28 14:35:36,890 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 30 [2020-10-28 14:35:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:36,890 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-10-28 14:35:36,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-10-28 14:35:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:35:36,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:36,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:36,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:35:36,892 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 807861630, now seen corresponding path program 3 times [2020-10-28 14:35:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:36,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181048231] [2020-10-28 14:35:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:36,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:37,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:37,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:35:37,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:37,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-28 14:35:37,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:37,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:37,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:35:37,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:37,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:35:37,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:37,900 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-28 14:35:38,157 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-28 14:35:38,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:38,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:38,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:38,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:38,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:38,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:38,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:38,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:38,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:38,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:38,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:38,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:38,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181048231] [2020-10-28 14:35:38,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:38,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:35:38,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145461790] [2020-10-28 14:35:38,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:35:38,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:38,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:35:38,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:38,595 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 12 states. [2020-10-28 14:35:38,880 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-28 14:35:39,205 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-28 14:35:39,390 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-28 14:35:39,594 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-28 14:35:39,917 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-28 14:35:40,177 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-28 14:35:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:40,461 INFO L93 Difference]: Finished difference Result 126 states and 160 transitions. [2020-10-28 14:35:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:35:40,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 14:35:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:40,462 INFO L225 Difference]: With dead ends: 126 [2020-10-28 14:35:40,462 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 14:35:40,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:35:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 14:35:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-10-28 14:35:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 14:35:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-10-28 14:35:40,475 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 30 [2020-10-28 14:35:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:40,477 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-10-28 14:35:40,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-10-28 14:35:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:35:40,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:40,477 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:40,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:35:40,479 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash 809708672, now seen corresponding path program 3 times [2020-10-28 14:35:40,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:40,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925943336] [2020-10-28 14:35:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:40,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:41,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:41,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:41,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:35:41,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-28 14:35:41,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:41,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:35:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:35:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:42,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:42,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:42,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:42,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:42,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:42,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:42,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:42,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:42,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:42,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:42,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:42,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:42,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925943336] [2020-10-28 14:35:42,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:42,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:35:42,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162870218] [2020-10-28 14:35:42,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:35:42,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:42,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:35:42,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:42,400 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 12 states. [2020-10-28 14:35:42,693 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 78 [2020-10-28 14:35:43,125 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-10-28 14:35:43,303 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-28 14:35:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:44,156 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2020-10-28 14:35:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:35:44,157 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 14:35:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:44,158 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:35:44,158 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:35:44,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:35:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:35:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2020-10-28 14:35:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 14:35:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-10-28 14:35:44,168 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 30 [2020-10-28 14:35:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:44,168 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-10-28 14:35:44,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-10-28 14:35:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:35:44,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:44,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:44,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:35:44,169 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1712098304, now seen corresponding path program 4 times [2020-10-28 14:35:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:44,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274699169] [2020-10-28 14:35:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:44,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:44,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:45,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:46,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1973 [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:35:46,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:46,394 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-28 14:35:46,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:46,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:46,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:46,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:46,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:46,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:46,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:46,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:46,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:46,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:35:46,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274699169] [2020-10-28 14:35:46,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:46,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:35:46,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920140397] [2020-10-28 14:35:46,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:35:46,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:35:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:35:46,681 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 11 states. [2020-10-28 14:35:46,861 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-28 14:35:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:47,176 INFO L93 Difference]: Finished difference Result 115 states and 143 transitions. [2020-10-28 14:35:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:35:47,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 14:35:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:47,178 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:35:47,178 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:35:47,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:35:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-10-28 14:35:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:35:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2020-10-28 14:35:47,188 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 30 [2020-10-28 14:35:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:47,188 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2020-10-28 14:35:47,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:35:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2020-10-28 14:35:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:35:47,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:47,189 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:47,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:35:47,189 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:47,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1710251262, now seen corresponding path program 4 times [2020-10-28 14:35:47,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:47,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575549886] [2020-10-28 14:35:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:47,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:49,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:49,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:35:49,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:35:49,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1959 [2020-10-28 14:35:49,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:49,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:49,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:35:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:35:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:49,510 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 14:35:49,842 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-28 14:35:49,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:49,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:49,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:49,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:49,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:49,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:49,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:49,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:49,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:49,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575549886] [2020-10-28 14:35:49,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:49,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:35:49,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094204825] [2020-10-28 14:35:49,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:35:49,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:49,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:35:49,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:49,966 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand 12 states. [2020-10-28 14:35:50,228 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 75 [2020-10-28 14:35:50,601 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2020-10-28 14:35:50,770 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-28 14:35:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:51,444 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2020-10-28 14:35:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:35:51,445 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 14:35:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:51,446 INFO L225 Difference]: With dead ends: 142 [2020-10-28 14:35:51,446 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:35:51,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:35:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:35:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2020-10-28 14:35:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 14:35:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2020-10-28 14:35:51,457 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 30 [2020-10-28 14:35:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:51,457 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2020-10-28 14:35:51,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2020-10-28 14:35:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:35:51,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:51,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:51,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:35:51,459 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1108143118, now seen corresponding path program 4 times [2020-10-28 14:35:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:51,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066269587] [2020-10-28 14:35:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:51,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:51,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:52,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:52,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:35:52,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:52,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1351 [2020-10-28 14:35:52,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:52,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:52,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:35:52,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:52,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:35:52,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:53,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:53,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:53,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:53,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:53,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:35:53,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:53,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:53,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:53,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:53,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:35:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:35:53,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066269587] [2020-10-28 14:35:53,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:53,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:35:53,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773527836] [2020-10-28 14:35:53,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:35:53,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:35:53,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:35:53,377 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand 10 states. [2020-10-28 14:35:53,600 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-28 14:35:53,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:53,891 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-10-28 14:35:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:35:53,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-28 14:35:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:53,893 INFO L225 Difference]: With dead ends: 113 [2020-10-28 14:35:53,893 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:35:53,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:35:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-28 14:35:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 14:35:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2020-10-28 14:35:53,904 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 32 [2020-10-28 14:35:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:53,904 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2020-10-28 14:35:53,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:35:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2020-10-28 14:35:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:35:53,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:53,905 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:53,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:35:53,905 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash -176531086, now seen corresponding path program 5 times [2020-10-28 14:35:53,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:53,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544416591] [2020-10-28 14:35:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:55,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:55,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:35:55,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:55,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1874 [2020-10-28 14:35:55,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:55,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:55,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:35:55,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:55,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:35:55,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:56,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:56,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:56,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:56,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:56,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:56,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:56,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544416591] [2020-10-28 14:35:56,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:56,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:35:56,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020819670] [2020-10-28 14:35:56,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:35:56,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:56,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:35:56,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:56,389 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand 12 states. [2020-10-28 14:35:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:56,968 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2020-10-28 14:35:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:35:56,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:35:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:56,970 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:35:56,970 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:35:56,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:35:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-10-28 14:35:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 14:35:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-10-28 14:35:56,981 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 32 [2020-10-28 14:35:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:56,981 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-10-28 14:35:56,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-10-28 14:35:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:35:56,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:56,982 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:56,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:35:56,982 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash 83481394, now seen corresponding path program 4 times [2020-10-28 14:35:56,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:56,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834946576] [2020-10-28 14:35:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:57,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:58,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1612 [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:35:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:59,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:59,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:59,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:59,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:59,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:59,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:59,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:59,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834946576] [2020-10-28 14:35:59,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:59,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:35:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946249307] [2020-10-28 14:35:59,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:35:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:35:59,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:59,277 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 12 states. [2020-10-28 14:35:59,450 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-28 14:35:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:59,938 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2020-10-28 14:35:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:35:59,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:35:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:59,940 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:35:59,940 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 14:35:59,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:35:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 14:35:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2020-10-28 14:35:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 14:35:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2020-10-28 14:35:59,951 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 32 [2020-10-28 14:35:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:59,952 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2020-10-28 14:35:59,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:59,952 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2020-10-28 14:35:59,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:35:59,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:59,953 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:59,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:35:59,953 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:59,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1858488756, now seen corresponding path program 5 times [2020-10-28 14:35:59,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:59,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155743375] [2020-10-28 14:35:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:00,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:00,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:00,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:01,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:01,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:02,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:03,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:03,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:36:03,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:36:03,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3331 [2020-10-28 14:36:03,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:03,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:36:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:36:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:04,021 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-28 14:36:04,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:04,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:04,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:04,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:04,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155743375] [2020-10-28 14:36:04,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:04,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:36:04,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944771396] [2020-10-28 14:36:04,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:36:04,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:36:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:36:04,112 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 12 states. [2020-10-28 14:36:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:04,802 INFO L93 Difference]: Finished difference Result 155 states and 199 transitions. [2020-10-28 14:36:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:36:04,803 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:36:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:04,804 INFO L225 Difference]: With dead ends: 155 [2020-10-28 14:36:04,804 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 14:36:04,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 14:36:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2020-10-28 14:36:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 14:36:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2020-10-28 14:36:04,815 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 32 [2020-10-28 14:36:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:04,816 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2020-10-28 14:36:04,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:36:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2020-10-28 14:36:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:36:04,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:04,816 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:04,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:36:04,817 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1467911709, now seen corresponding path program 5 times [2020-10-28 14:36:04,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:04,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754573411] [2020-10-28 14:36:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:04,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:06,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:36:06,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:36:06,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-28 14:36:06,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:06,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:06,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:36:06,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:06,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:36:06,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,259 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2020-10-28 14:36:07,397 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-28 14:36:07,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:07,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:07,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:07,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:07,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:07,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:07,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:07,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:07,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:07,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:07,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:07,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:36:07,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754573411] [2020-10-28 14:36:07,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:07,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:36:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531064652] [2020-10-28 14:36:07,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:36:07,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:36:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:36:07,772 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand 11 states. [2020-10-28 14:36:08,062 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2020-10-28 14:36:08,465 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-28 14:36:08,636 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-28 14:36:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:08,724 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2020-10-28 14:36:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:36:08,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-28 14:36:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:08,726 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:36:08,726 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:36:08,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:36:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-28 14:36:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 14:36:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2020-10-28 14:36:08,737 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 35 [2020-10-28 14:36:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:08,737 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2020-10-28 14:36:08,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:36:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2020-10-28 14:36:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:36:08,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:08,738 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:08,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:36:08,738 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash -536299677, now seen corresponding path program 6 times [2020-10-28 14:36:08,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:08,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058748028] [2020-10-28 14:36:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:08,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:09,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:09,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:36:09,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:09,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1177 [2020-10-28 14:36:09,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:09,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:09,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:36:09,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:09,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:36:09,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:10,301 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-28 14:36:10,480 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-28 14:36:10,614 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-28 14:36:10,758 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-28 14:36:11,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:11,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:11,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:11,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:11,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:11,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:11,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:11,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058748028] [2020-10-28 14:36:11,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:11,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:11,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180409847] [2020-10-28 14:36:11,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:11,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:11,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:11,232 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand 14 states. [2020-10-28 14:36:11,576 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 71 [2020-10-28 14:36:11,958 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-28 14:36:12,153 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-28 14:36:12,374 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-28 14:36:12,617 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2020-10-28 14:36:12,922 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 51 [2020-10-28 14:36:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:13,487 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2020-10-28 14:36:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:36:13,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-28 14:36:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:13,489 INFO L225 Difference]: With dead ends: 127 [2020-10-28 14:36:13,489 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 14:36:13,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:36:13,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 14:36:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2020-10-28 14:36:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 14:36:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2020-10-28 14:36:13,508 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 35 [2020-10-28 14:36:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:13,509 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2020-10-28 14:36:13,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2020-10-28 14:36:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:36:13,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:13,510 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:13,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:36:13,510 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -534452635, now seen corresponding path program 5 times [2020-10-28 14:36:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:13,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719403666] [2020-10-28 14:36:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:13,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:14,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:36:15,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:15,897 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-28 14:36:16,021 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-28 14:36:16,165 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-28 14:36:16,300 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-28 14:36:16,459 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-28 14:36:16,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:16,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:16,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:16,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:16,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:16,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:36:16,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:16,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:16,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:16,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:16,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719403666] [2020-10-28 14:36:16,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:16,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149908991] [2020-10-28 14:36:16,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:16,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:16,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:16,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:16,836 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand 14 states. [2020-10-28 14:36:17,175 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 69 [2020-10-28 14:36:17,606 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-28 14:36:17,822 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 50 [2020-10-28 14:36:18,023 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-10-28 14:36:18,306 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-28 14:36:18,504 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-28 14:36:18,680 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-28 14:36:18,877 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-28 14:36:19,043 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-28 14:36:19,232 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-28 14:36:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:19,702 INFO L93 Difference]: Finished difference Result 129 states and 161 transitions. [2020-10-28 14:36:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:36:19,702 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-28 14:36:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:19,703 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:36:19,703 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 14:36:19,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:36:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 14:36:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2020-10-28 14:36:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 14:36:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2020-10-28 14:36:19,717 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 35 [2020-10-28 14:36:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:19,717 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2020-10-28 14:36:19,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2020-10-28 14:36:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:36:19,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:19,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:19,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:36:19,719 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1238707685, now seen corresponding path program 7 times [2020-10-28 14:36:19,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:19,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932464574] [2020-10-28 14:36:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:20,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:20,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:36:20,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:20,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-28 14:36:20,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:20,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:20,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:36:20,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:20,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:36:20,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:21,270 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-28 14:36:21,416 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-28 14:36:21,546 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 14:36:21,673 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-28 14:36:22,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:22,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:22,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:22,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:22,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:22,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:22,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:22,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:22,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:22,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:22,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:22,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932464574] [2020-10-28 14:36:22,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:22,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:22,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200281087] [2020-10-28 14:36:22,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:22,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:22,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:22,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:22,061 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand 14 states. [2020-10-28 14:36:22,366 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 68 [2020-10-28 14:36:22,667 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-28 14:36:22,868 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-28 14:36:23,100 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-28 14:36:23,287 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-28 14:36:23,626 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-28 14:36:23,760 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-28 14:36:23,974 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-28 14:36:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:24,527 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2020-10-28 14:36:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:36:24,528 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-28 14:36:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:24,529 INFO L225 Difference]: With dead ends: 134 [2020-10-28 14:36:24,530 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 14:36:24,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:36:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 14:36:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 114. [2020-10-28 14:36:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 14:36:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2020-10-28 14:36:24,543 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 35 [2020-10-28 14:36:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:24,543 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2020-10-28 14:36:24,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2020-10-28 14:36:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:36:24,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:24,544 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:24,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:36:24,544 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1240554727, now seen corresponding path program 6 times [2020-10-28 14:36:24,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:24,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263935878] [2020-10-28 14:36:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:24,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:25,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:36:27,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:27,351 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-28 14:36:27,485 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-28 14:36:27,646 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-28 14:36:27,776 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-28 14:36:28,092 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 14:36:28,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:28,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:28,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:28,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:28,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:28,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:28,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:28,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:28,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:28,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263935878] [2020-10-28 14:36:28,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:28,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:28,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500082556] [2020-10-28 14:36:28,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:28,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:28,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:28,516 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand 15 states. [2020-10-28 14:36:28,884 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 67 [2020-10-28 14:36:29,280 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2020-10-28 14:36:29,585 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 72 [2020-10-28 14:36:29,884 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-28 14:36:30,188 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-28 14:36:30,388 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-28 14:36:30,632 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2020-10-28 14:36:30,876 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 56 [2020-10-28 14:36:31,057 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-28 14:36:31,377 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2020-10-28 14:36:31,551 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 14:36:31,780 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-28 14:36:32,013 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-28 14:36:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:32,583 INFO L93 Difference]: Finished difference Result 155 states and 198 transitions. [2020-10-28 14:36:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:36:32,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-28 14:36:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:32,586 INFO L225 Difference]: With dead ends: 155 [2020-10-28 14:36:32,586 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:36:32,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:36:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:36:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2020-10-28 14:36:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 14:36:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-10-28 14:36:32,597 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 35 [2020-10-28 14:36:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:32,597 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-10-28 14:36:32,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:36:32,597 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-10-28 14:36:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:36:32,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:32,598 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:32,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:36:32,598 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:32,598 INFO L82 PathProgramCache]: Analyzing trace with hash -276287197, now seen corresponding path program 7 times [2020-10-28 14:36:32,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:32,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6824479] [2020-10-28 14:36:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:33,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:35,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:35,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:36:35,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:36:35,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2863 [2020-10-28 14:36:35,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:35,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:35,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:36:35,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:35,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:36:35,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:35,785 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-10-28 14:36:35,900 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-28 14:36:36,085 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-28 14:36:36,262 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-28 14:36:36,401 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-28 14:36:36,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:36,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:36,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:36,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:36,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6824479] [2020-10-28 14:36:36,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:36,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:36,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733856915] [2020-10-28 14:36:36,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:36,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:36,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:36,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:36,761 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 14 states. [2020-10-28 14:36:37,090 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 67 [2020-10-28 14:36:37,529 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2020-10-28 14:36:37,755 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-10-28 14:36:37,970 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2020-10-28 14:36:38,243 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-28 14:36:38,427 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-28 14:36:38,592 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-28 14:36:38,761 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-28 14:36:38,923 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-28 14:36:39,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:39,417 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2020-10-28 14:36:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:36:39,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-28 14:36:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:39,419 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:36:39,419 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:36:39,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:36:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:36:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 103. [2020-10-28 14:36:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 14:36:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2020-10-28 14:36:39,432 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 35 [2020-10-28 14:36:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:39,432 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2020-10-28 14:36:39,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2020-10-28 14:36:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:36:39,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:39,433 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:39,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:36:39,433 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:39,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1609872367, now seen corresponding path program 6 times [2020-10-28 14:36:39,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:39,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750330051] [2020-10-28 14:36:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:39,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:39,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:40,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:42,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:43,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:43,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:36:43,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:36:43,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4437 [2020-10-28 14:36:43,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:43,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:43,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:43,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:43,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:36:43,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:44,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:44,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:44,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:36:44,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750330051] [2020-10-28 14:36:44,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:44,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:36:44,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759852584] [2020-10-28 14:36:44,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:36:44,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:44,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:36:44,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:36:44,747 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand 12 states. [2020-10-28 14:36:44,909 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-28 14:36:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:45,539 INFO L93 Difference]: Finished difference Result 126 states and 155 transitions. [2020-10-28 14:36:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:36:45,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-28 14:36:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:45,541 INFO L225 Difference]: With dead ends: 126 [2020-10-28 14:36:45,541 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 14:36:45,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 14:36:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2020-10-28 14:36:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 14:36:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2020-10-28 14:36:45,562 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 37 [2020-10-28 14:36:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:45,562 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2020-10-28 14:36:45,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:36:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2020-10-28 14:36:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:36:45,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:45,563 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:45,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:36:45,563 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash -910087567, now seen corresponding path program 7 times [2020-10-28 14:36:45,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:45,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097623633] [2020-10-28 14:36:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:45,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:45,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:47,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:47,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:36:47,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-28 14:36:47,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:47,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:47,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:47,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:47,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:36:47,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:48,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:48,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:48,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:48,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:48,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:48,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:48,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:48,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:48,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:48,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:36:48,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097623633] [2020-10-28 14:36:48,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:48,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:36:48,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585998246] [2020-10-28 14:36:48,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:36:48,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:36:48,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:36:48,111 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand 12 states. [2020-10-28 14:36:48,269 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-28 14:36:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:48,893 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2020-10-28 14:36:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:36:48,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-28 14:36:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:48,895 INFO L225 Difference]: With dead ends: 131 [2020-10-28 14:36:48,895 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:36:48,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:36:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:36:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2020-10-28 14:36:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 14:36:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2020-10-28 14:36:48,906 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 37 [2020-10-28 14:36:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:48,906 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2020-10-28 14:36:48,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:36:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2020-10-28 14:36:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:36:48,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:48,906 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:48,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:36:48,907 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash 739796126, now seen corresponding path program 8 times [2020-10-28 14:36:48,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:48,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340007426] [2020-10-28 14:36:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:49,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4584 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:36:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:36:53,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:53,803 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-28 14:36:53,919 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-28 14:36:54,077 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-28 14:36:54,224 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-28 14:36:54,403 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-28 14:36:54,545 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-28 14:36:55,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:55,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:55,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:55,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:55,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:55,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:36:55,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:55,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:55,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:55,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:55,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:55,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:55,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340007426] [2020-10-28 14:36:55,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:55,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:36:55,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471764949] [2020-10-28 14:36:55,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:36:55,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:55,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:36:55,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:36:55,079 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 16 states. [2020-10-28 14:36:55,435 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 57 [2020-10-28 14:36:55,824 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2020-10-28 14:36:56,036 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-28 14:36:56,236 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-28 14:36:56,640 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-28 14:36:56,835 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-28 14:36:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:57,642 INFO L93 Difference]: Finished difference Result 144 states and 175 transitions. [2020-10-28 14:36:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:36:57,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:36:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:57,643 INFO L225 Difference]: With dead ends: 144 [2020-10-28 14:36:57,643 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 14:36:57,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:36:57,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 14:36:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2020-10-28 14:36:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 14:36:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2020-10-28 14:36:57,656 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 40 [2020-10-28 14:36:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:57,656 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2020-10-28 14:36:57,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:36:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2020-10-28 14:36:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:36:57,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:57,657 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:57,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:36:57,657 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash 741643168, now seen corresponding path program 8 times [2020-10-28 14:36:57,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:57,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320183896] [2020-10-28 14:36:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:57,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:58,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:00,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:02,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:37:02,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:03,033 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-28 14:37:03,178 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-28 14:37:03,379 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2020-10-28 14:37:03,579 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-28 14:37:03,754 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-28 14:37:03,888 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-28 14:37:04,026 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 14:37:04,277 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-28 14:37:04,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:04,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:04,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:04,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:04,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:04,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:04,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:04,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:04,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:04,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:04,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:04,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320183896] [2020-10-28 14:37:04,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:04,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:37:04,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719445644] [2020-10-28 14:37:04,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:37:04,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:37:04,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:37:04,628 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand 16 states. [2020-10-28 14:37:05,003 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 74 [2020-10-28 14:37:05,594 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2020-10-28 14:37:05,902 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2020-10-28 14:37:06,125 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2020-10-28 14:37:06,430 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-28 14:37:06,630 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-28 14:37:06,829 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-28 14:37:06,999 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-28 14:37:07,175 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-28 14:37:07,386 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-28 14:37:07,626 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 58 [2020-10-28 14:37:07,884 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 59 [2020-10-28 14:37:08,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:08,235 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2020-10-28 14:37:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:37:08,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:37:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:08,237 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:37:08,237 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 14:37:08,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:37:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 14:37:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2020-10-28 14:37:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 14:37:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2020-10-28 14:37:08,253 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 40 [2020-10-28 14:37:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:08,254 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2020-10-28 14:37:08,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:37:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2020-10-28 14:37:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:37:08,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:08,259 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:08,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:37:08,259 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:08,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1780163808, now seen corresponding path program 9 times [2020-10-28 14:37:08,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:08,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830945780] [2020-10-28 14:37:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:08,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:10,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:37:10,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:10,235 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-28 14:37:10,499 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-28 14:37:10,655 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-28 14:37:10,831 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-28 14:37:10,967 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-28 14:37:11,109 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-28 14:37:11,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:11,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:11,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:11,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:11,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:11,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:11,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:11,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830945780] [2020-10-28 14:37:11,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:11,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:37:11,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491843833] [2020-10-28 14:37:11,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:37:11,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:11,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:37:11,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:37:11,588 INFO L87 Difference]: Start difference. First operand 138 states and 170 transitions. Second operand 16 states. [2020-10-28 14:37:11,902 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-10-28 14:37:12,287 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-28 14:37:12,532 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2020-10-28 14:37:12,801 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-10-28 14:37:13,105 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2020-10-28 14:37:13,432 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2020-10-28 14:37:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:13,958 INFO L93 Difference]: Finished difference Result 159 states and 197 transitions. [2020-10-28 14:37:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:37:13,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:37:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:13,963 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:37:13,963 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:37:13,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:37:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:37:13,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2020-10-28 14:37:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 14:37:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2020-10-28 14:37:13,985 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 40 [2020-10-28 14:37:13,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:13,985 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2020-10-28 14:37:13,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:37:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2020-10-28 14:37:13,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:37:13,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:13,986 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:13,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:37:13,986 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:13,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1778316766, now seen corresponding path program 9 times [2020-10-28 14:37:13,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:13,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608197814] [2020-10-28 14:37:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:14,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3043 [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:17,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:37:17,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:17,432 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-28 14:37:17,576 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-28 14:37:17,720 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-28 14:37:17,885 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-28 14:37:18,140 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-28 14:37:18,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:18,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:18,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:18,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:18,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:18,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:18,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:18,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:18,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608197814] [2020-10-28 14:37:18,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:18,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:37:18,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160619221] [2020-10-28 14:37:18,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:37:18,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:18,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:37:18,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:37:18,581 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand 16 states. [2020-10-28 14:37:18,917 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 67 [2020-10-28 14:37:19,356 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-10-28 14:37:19,602 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-28 14:37:19,807 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2020-10-28 14:37:20,038 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-28 14:37:20,219 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-28 14:37:20,402 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-28 14:37:20,568 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-28 14:37:20,734 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-28 14:37:21,236 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 52 [2020-10-28 14:37:21,487 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2020-10-28 14:37:21,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:21,840 INFO L93 Difference]: Finished difference Result 169 states and 209 transitions. [2020-10-28 14:37:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:37:21,841 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:37:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:21,842 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:37:21,842 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 14:37:21,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:37:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 14:37:21,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 128. [2020-10-28 14:37:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 14:37:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 155 transitions. [2020-10-28 14:37:21,855 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 155 transitions. Word has length 40 [2020-10-28 14:37:21,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:21,855 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 155 transitions. [2020-10-28 14:37:21,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:37:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 155 transitions. [2020-10-28 14:37:21,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:37:21,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:21,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:21,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:37:21,856 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash 997961564, now seen corresponding path program 10 times [2020-10-28 14:37:21,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:21,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364820050] [2020-10-28 14:37:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:21,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:23,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1628 [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:37:23,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:23,817 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-28 14:37:23,983 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-28 14:37:24,223 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-28 14:37:24,429 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-28 14:37:24,632 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-28 14:37:24,795 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-28 14:37:25,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:25,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:25,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:25,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364820050] [2020-10-28 14:37:25,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:25,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:37:25,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490883314] [2020-10-28 14:37:25,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:37:25,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:25,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:37:25,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:37:25,398 INFO L87 Difference]: Start difference. First operand 128 states and 155 transitions. Second operand 16 states. [2020-10-28 14:37:25,727 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 65 [2020-10-28 14:37:26,108 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-28 14:37:26,382 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2020-10-28 14:37:26,681 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-28 14:37:26,908 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-28 14:37:27,092 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 14:37:27,333 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2020-10-28 14:37:27,529 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-28 14:37:27,772 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2020-10-28 14:37:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:28,820 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2020-10-28 14:37:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:37:28,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:37:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:28,823 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:37:28,824 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 14:37:28,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:37:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 14:37:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2020-10-28 14:37:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 14:37:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 159 transitions. [2020-10-28 14:37:28,840 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 159 transitions. Word has length 40 [2020-10-28 14:37:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:28,840 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 159 transitions. [2020-10-28 14:37:28,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:37:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 159 transitions. [2020-10-28 14:37:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:37:28,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:28,841 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:28,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:37:28,841 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:28,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:28,842 INFO L82 PathProgramCache]: Analyzing trace with hash 999808606, now seen corresponding path program 10 times [2020-10-28 14:37:28,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:28,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691425645] [2020-10-28 14:37:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:28,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:31,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:32,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:33,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:33,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:37:33,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:37:33,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 14:37:33,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:33,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:37:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:37:33,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:34,242 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-28 14:37:34,386 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2020-10-28 14:37:34,549 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2020-10-28 14:37:34,781 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-28 14:37:34,984 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-28 14:37:35,157 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-28 14:37:35,344 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-28 14:37:35,494 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-28 14:37:36,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:36,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:36,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:36,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:36,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:36,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:36,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:36,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:36,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:36,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:36,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:36,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:36,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691425645] [2020-10-28 14:37:36,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:36,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:37:36,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585609144] [2020-10-28 14:37:36,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:37:36,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:36,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:37:36,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:37:36,112 INFO L87 Difference]: Start difference. First operand 131 states and 159 transitions. Second operand 17 states. [2020-10-28 14:37:36,479 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 69 [2020-10-28 14:37:37,073 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-10-28 14:37:37,386 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 52 [2020-10-28 14:37:37,672 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-10-28 14:37:38,051 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-28 14:37:38,261 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-28 14:37:38,438 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-28 14:37:38,637 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-28 14:37:38,822 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-28 14:37:39,185 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-28 14:37:39,417 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-28 14:37:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:40,013 INFO L93 Difference]: Finished difference Result 175 states and 217 transitions. [2020-10-28 14:37:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:37:40,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-28 14:37:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:40,015 INFO L225 Difference]: With dead ends: 175 [2020-10-28 14:37:40,015 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 14:37:40,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:37:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 14:37:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2020-10-28 14:37:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 14:37:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 173 transitions. [2020-10-28 14:37:40,031 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 173 transitions. Word has length 40 [2020-10-28 14:37:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:40,031 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 173 transitions. [2020-10-28 14:37:40,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:37:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 173 transitions. [2020-10-28 14:37:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:37:40,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:40,032 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:40,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:37:40,032 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:40,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1520151328, now seen corresponding path program 11 times [2020-10-28 14:37:40,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:40,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809846504] [2020-10-28 14:37:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:40,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:40,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:42,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:43,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:44,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:45,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:37:45,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:45,367 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-28 14:37:45,507 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-28 14:37:45,694 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-28 14:37:45,851 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-28 14:37:46,025 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-28 14:37:46,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:46,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:46,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:46,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:46,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:46,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:37:46,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:46,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:46,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:46,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809846504] [2020-10-28 14:37:46,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:46,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:37:46,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819022186] [2020-10-28 14:37:46,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:37:46,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:46,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:37:46,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:37:46,595 INFO L87 Difference]: Start difference. First operand 141 states and 173 transitions. Second operand 16 states. [2020-10-28 14:37:46,964 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2020-10-28 14:37:47,495 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-28 14:37:47,890 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 77 [2020-10-28 14:37:48,305 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2020-10-28 14:37:48,731 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2020-10-28 14:37:49,217 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 88 [2020-10-28 14:37:49,539 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2020-10-28 14:37:49,885 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-28 14:37:50,266 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-10-28 14:37:50,611 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-28 14:37:50,948 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-28 14:37:51,327 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-28 14:37:51,591 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-28 14:37:51,870 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-28 14:37:52,143 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-28 14:37:52,442 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-28 14:37:52,783 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-10-28 14:37:53,148 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-10-28 14:37:53,472 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 14:37:53,675 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 14:37:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:53,868 INFO L93 Difference]: Finished difference Result 186 states and 234 transitions. [2020-10-28 14:37:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:37:53,869 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:37:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:53,870 INFO L225 Difference]: With dead ends: 186 [2020-10-28 14:37:53,870 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 14:37:53,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:37:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 14:37:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 110. [2020-10-28 14:37:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:37:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2020-10-28 14:37:53,885 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 40 [2020-10-28 14:37:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:53,885 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2020-10-28 14:37:53,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:37:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2020-10-28 14:37:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:37:53,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:53,886 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:53,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:37:53,886 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:53,886 INFO L82 PathProgramCache]: Analyzing trace with hash -848551776, now seen corresponding path program 11 times [2020-10-28 14:37:53,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:53,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980974323] [2020-10-28 14:37:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:53,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:54,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:56,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:56,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:37:56,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2907 [2020-10-28 14:37:56,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:56,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:37:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:37:56,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:57,047 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-28 14:37:57,211 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-28 14:37:57,350 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-28 14:37:57,471 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-28 14:37:57,634 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-28 14:37:58,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:58,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:58,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:58,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:58,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:58,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:58,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:58,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:58,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:58,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980974323] [2020-10-28 14:37:58,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:58,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:37:58,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575383633] [2020-10-28 14:37:58,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:37:58,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:37:58,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:37:58,381 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand 16 states. [2020-10-28 14:37:58,749 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2020-10-28 14:37:59,139 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-28 14:37:59,344 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-28 14:37:59,560 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-28 14:37:59,818 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-28 14:38:00,105 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-28 14:38:00,352 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-28 14:38:00,588 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-28 14:38:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:01,120 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-10-28 14:38:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:38:01,121 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:38:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:01,121 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:38:01,121 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 14:38:01,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:38:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 14:38:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 140. [2020-10-28 14:38:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 14:38:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2020-10-28 14:38:01,143 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 40 [2020-10-28 14:38:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:01,143 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2020-10-28 14:38:01,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:38:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2020-10-28 14:38:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:38:01,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:01,144 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:01,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:38:01,144 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash -846704734, now seen corresponding path program 12 times [2020-10-28 14:38:01,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:01,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324354324] [2020-10-28 14:38:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:01,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:01,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:03,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:04,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:04,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:38:04,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:38:04,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3214 [2020-10-28 14:38:04,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:04,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:04,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:38:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:38:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:38:04,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:04,667 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-28 14:38:04,899 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-28 14:38:05,033 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-28 14:38:05,164 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 14:38:05,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:05,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:05,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:05,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:05,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:05,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:38:05,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:05,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:05,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:05,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:05,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:05,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324354324] [2020-10-28 14:38:05,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:05,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:38:05,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560769610] [2020-10-28 14:38:05,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:38:05,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:38:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:38:05,828 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand 16 states. [2020-10-28 14:38:06,169 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 69 [2020-10-28 14:38:06,728 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-10-28 14:38:06,937 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-28 14:38:07,113 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-28 14:38:07,441 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-28 14:38:07,626 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-28 14:38:07,793 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-28 14:38:08,090 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-28 14:38:08,329 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 14:38:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:09,033 INFO L93 Difference]: Finished difference Result 217 states and 267 transitions. [2020-10-28 14:38:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:38:09,034 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:38:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:09,035 INFO L225 Difference]: With dead ends: 217 [2020-10-28 14:38:09,035 INFO L226 Difference]: Without dead ends: 203 [2020-10-28 14:38:09,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:38:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-28 14:38:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 140. [2020-10-28 14:38:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 14:38:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2020-10-28 14:38:09,054 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 40 [2020-10-28 14:38:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:09,054 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2020-10-28 14:38:09,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:38:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2020-10-28 14:38:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:38:09,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:09,055 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:09,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:38:09,055 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:09,055 INFO L82 PathProgramCache]: Analyzing trace with hash 928302628, now seen corresponding path program 13 times [2020-10-28 14:38:09,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:09,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137726171] [2020-10-28 14:38:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:09,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:09,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:10,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:12,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:13,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:38:14,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:38:14,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:14,427 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-28 14:38:14,553 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-28 14:38:14,705 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2020-10-28 14:38:14,847 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-28 14:38:14,982 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-28 14:38:15,278 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-28 14:38:15,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:15,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:15,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:15,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:15,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:15,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:38:15,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:15,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:15,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:15,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:15,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:15,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:15,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137726171] [2020-10-28 14:38:15,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:15,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:38:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309263246] [2020-10-28 14:38:15,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:38:15,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:38:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:38:15,814 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand 16 states. [2020-10-28 14:38:16,174 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 69 [2020-10-28 14:38:16,711 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-28 14:38:16,916 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-28 14:38:17,097 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2020-10-28 14:38:17,405 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-28 14:38:17,563 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-28 14:38:17,744 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-28 14:38:18,053 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-28 14:38:18,314 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-28 14:38:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:18,851 INFO L93 Difference]: Finished difference Result 220 states and 270 transitions. [2020-10-28 14:38:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:38:18,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:38:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:18,853 INFO L225 Difference]: With dead ends: 220 [2020-10-28 14:38:18,853 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 14:38:18,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:38:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 14:38:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 133. [2020-10-28 14:38:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:38:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2020-10-28 14:38:18,870 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 40 [2020-10-28 14:38:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:18,870 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2020-10-28 14:38:18,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:38:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2020-10-28 14:38:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:38:18,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:18,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:18,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:38:18,872 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash -617586798, now seen corresponding path program 8 times [2020-10-28 14:38:18,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:18,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188073181] [2020-10-28 14:38:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:19,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:20,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:21,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:22,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:23,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5491 [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:38:24,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:25,120 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-28 14:38:25,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:25,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:25,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:25,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:25,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:25,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:38:25,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:25,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:25,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:25,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:25,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:25,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:38:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:38:25,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188073181] [2020-10-28 14:38:25,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:38:25,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:38:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464773157] [2020-10-28 14:38:25,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:38:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:38:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:38:25,389 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand 13 states. [2020-10-28 14:38:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:26,717 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2020-10-28 14:38:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:38:26,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-28 14:38:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:26,720 INFO L225 Difference]: With dead ends: 155 [2020-10-28 14:38:26,720 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 14:38:26,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:38:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 14:38:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2020-10-28 14:38:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 14:38:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2020-10-28 14:38:26,740 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 42 [2020-10-28 14:38:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:26,740 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2020-10-28 14:38:26,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:38:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2020-10-28 14:38:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:38:26,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:26,741 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:26,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:38:26,742 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1157420564, now seen corresponding path program 9 times [2020-10-28 14:38:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:26,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655595273] [2020-10-28 14:38:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:26,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:27,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:28,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:30,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3928 [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:38:30,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0