/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-data/shared_mem1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:14:49,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:14:49,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:14:49,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:14:49,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:14:49,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:14:49,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:14:49,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:14:49,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:14:49,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:14:49,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:14:49,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:14:49,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:14:49,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:14:49,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:14:49,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:14:49,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:14:49,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:14:49,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:14:49,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:14:49,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:14:49,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:14:49,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:14:49,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:14:49,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:14:49,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:14:49,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:14:49,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:14:49,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:14:49,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:14:49,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:14:49,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:14:49,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:14:49,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:14:49,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:14:49,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:14:49,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:14:49,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:14:49,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:14:49,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:14:49,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:14:49,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:14:49,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:14:49,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:14:49,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:14:49,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:14:49,681 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:14:49,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:14:49,681 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:14:49,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:14:49,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:14:49,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:14:49,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:14:49,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:14:49,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:14:49,684 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:14:49,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:14:49,684 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:14:49,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:14:49,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:14:49,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:14:49,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:14:49,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:14:49,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:14:49,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:14:49,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:14:49,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:14:49,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:14:49,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:14:49,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:14:49,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:14:49,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:14:50,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:14:50,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:14:50,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:14:50,131 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:14:50,132 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:14:50,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-29 09:14:50,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02181061a/530684a39bfc41e7873457f9f9845d50/FLAG3fc37020c [2020-10-29 09:14:51,057 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:14:51,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-29 09:14:51,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02181061a/530684a39bfc41e7873457f9f9845d50/FLAG3fc37020c [2020-10-29 09:14:51,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02181061a/530684a39bfc41e7873457f9f9845d50 [2020-10-29 09:14:51,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:14:51,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:14:51,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:14:51,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:14:51,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:14:51,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:14:51" (1/1) ... [2020-10-29 09:14:51,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2f502a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:51, skipping insertion in model container [2020-10-29 09:14:51,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:14:51" (1/1) ... [2020-10-29 09:14:51,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:14:51,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:14:51,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:14:51,866 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:14:51,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:14:52,030 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:14:52,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52 WrapperNode [2020-10-29 09:14:52,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:14:52,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:14:52,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:14:52,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:14:52,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (1/1) ... [2020-10-29 09:14:52,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (1/1) ... [2020-10-29 09:14:52,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (1/1) ... [2020-10-29 09:14:52,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (1/1) ... [2020-10-29 09:14:52,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (1/1) ... [2020-10-29 09:14:52,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (1/1) ... [2020-10-29 09:14:52,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (1/1) ... [2020-10-29 09:14:52,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:14:52,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:14:52,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:14:52,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:14:52,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:14:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:14:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:14:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:14:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:14:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:14:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:14:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:14:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:14:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:14:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:14:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:14:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:14:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:14:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:14:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:14:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:14:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:14:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:14:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:14:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:14:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:14:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:14:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:14:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:14:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:14:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:14:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:14:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:14:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:14:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:14:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:14:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:14:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:14:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:14:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:14:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:14:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:14:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:14:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:14:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:14:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:14:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:14:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:14:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:14:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:14:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:14:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:14:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:14:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:14:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:14:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:14:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:14:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:14:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:14:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:14:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:14:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:14:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:14:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:14:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:14:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:14:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:14:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:14:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:14:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:14:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:14:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:14:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:14:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:14:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:14:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:14:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:14:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:14:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:14:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:14:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:14:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:14:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:14:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:14:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:14:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:14:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:14:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:14:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:14:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:14:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:14:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:14:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:14:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:14:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:14:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:14:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:14:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:14:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:14:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:14:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:14:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:14:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:14:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:14:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:14:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:14:52,191 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:14:52,191 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:14:52,191 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:14:52,191 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:14:52,191 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:14:52,191 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:14:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:14:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:14:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:14:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:14:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:14:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:14:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:14:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:14:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:14:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:14:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:14:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:14:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:14:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:14:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:14:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:14:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:14:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:14:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:14:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:14:52,803 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:14:52,804 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:14:52,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:14:52 BoogieIcfgContainer [2020-10-29 09:14:52,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:14:52,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:14:52,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:14:52,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:14:52,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:14:51" (1/3) ... [2020-10-29 09:14:52,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6cec38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:14:52, skipping insertion in model container [2020-10-29 09:14:52,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:52" (2/3) ... [2020-10-29 09:14:52,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6cec38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:14:52, skipping insertion in model container [2020-10-29 09:14:52,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:14:52" (3/3) ... [2020-10-29 09:14:52,817 INFO L111 eAbstractionObserver]: Analyzing ICFG shared_mem1.i [2020-10-29 09:14:52,830 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:14:52,835 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:14:52,869 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:14:52,918 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:14:52,919 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:14:52,919 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:14:52,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:14:52,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:14:52,920 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:14:52,920 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:14:52,920 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:14:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-29 09:14:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:14:52,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:52,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:52,946 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:52,953 INFO L82 PathProgramCache]: Analyzing trace with hash 270174809, now seen corresponding path program 1 times [2020-10-29 09:14:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:52,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040092228] [2020-10-29 09:14:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:53,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:53,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:14:53,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:53,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-10-29 09:14:53,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:53,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:53,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:53,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:53,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:14:53,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:14:54,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:54,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:54,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:14:54,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:54,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:54,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:54,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040092228] [2020-10-29 09:14:54,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:14:54,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:14:54,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146220313] [2020-10-29 09:14:54,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:14:54,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:14:54,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:14:54,215 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 7 states. [2020-10-29 09:14:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:54,565 INFO L93 Difference]: Finished difference Result 56 states and 83 transitions. [2020-10-29 09:14:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:14:54,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-29 09:14:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:54,577 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:14:54,578 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:14:54,582 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 [2020-10-29 09:14:54,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:14:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-29 09:14:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:14:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-29 09:14:54,629 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2020-10-29 09:14:54,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:54,629 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-29 09:14:54,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:14:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-29 09:14:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:14:54,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:54,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:54,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:14:54,631 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:54,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1457013005, now seen corresponding path program 1 times [2020-10-29 09:14:54,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:54,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271733008] [2020-10-29 09:14:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:54,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:54,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:55,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:55,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:14:55,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:55,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-29 09:14:55,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:55,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:14:55,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:55,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:55,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:55,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:55,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:55,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:14:55,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:55,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:55,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:55,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:55,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271733008] [2020-10-29 09:14:55,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:14:55,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:14:55,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262268384] [2020-10-29 09:14:55,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:14:55,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:55,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:14:55,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:14:55,485 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 7 states. [2020-10-29 09:14:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:55,772 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-29 09:14:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:14:55,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-29 09:14:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:55,774 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:14:55,774 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:14:55,776 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 [2020-10-29 09:14:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:14:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-29 09:14:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:14:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-29 09:14:55,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2020-10-29 09:14:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:55,784 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-29 09:14:55,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:14:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-29 09:14:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:14:55,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:55,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:55,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:14:55,786 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash 317994357, now seen corresponding path program 1 times [2020-10-29 09:14:55,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:55,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590892489] [2020-10-29 09:14:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:55,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:55,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:55,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:56,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:56,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:56,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:56,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:14:56,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:14:56,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-29 09:14:56,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:56,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:14:56,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:56,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:56,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:56,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:56,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:56,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:14:56,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:56,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:56,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:56,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590892489] [2020-10-29 09:14:56,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:14:56,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:14:56,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91734635] [2020-10-29 09:14:56,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:14:56,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:56,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:14:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:14:56,484 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 7 states. [2020-10-29 09:14:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:56,709 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-29 09:14:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:14:56,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-29 09:14:56,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:56,711 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:14:56,711 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:14:56,711 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 [2020-10-29 09:14:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:14:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-29 09:14:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:14:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-29 09:14:56,718 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2020-10-29 09:14:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:56,719 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-29 09:14:56,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:14:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-29 09:14:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:14:56,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:56,720 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:56,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:14:56,721 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1676333536, now seen corresponding path program 1 times [2020-10-29 09:14:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:56,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583356678] [2020-10-29 09:14:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:56,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:57,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:57,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:14:57,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:57,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-29 09:14:57,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:57,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:57,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:57,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:57,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:14:57,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:57,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:57,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:57,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:57,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:57,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:14:57,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:57,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:57,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:57,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:57,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:57,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:57,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583356678] [2020-10-29 09:14:57,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:57,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:14:57,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131852327] [2020-10-29 09:14:57,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:14:57,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:14:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:14:57,339 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2020-10-29 09:14:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:57,518 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-29 09:14:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:14:57,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-29 09:14:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:57,519 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:14:57,519 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:14:57,520 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 [2020-10-29 09:14:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:14:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-29 09:14:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:14:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-29 09:14:57,527 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 20 [2020-10-29 09:14:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:57,527 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-29 09:14:57,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:14:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-29 09:14:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:14:57,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:57,529 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:57,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:14:57,529 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1674486494, now seen corresponding path program 1 times [2020-10-29 09:14:57,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:57,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147883866] [2020-10-29 09:14:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:57,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:58,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:58,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:14:58,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:58,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 813 [2020-10-29 09:14:58,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:58,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:58,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:58,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:58,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:14:58,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:58,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:58,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:58,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:58,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:58,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:14:58,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:58,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:58,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:58,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:58,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:58,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147883866] [2020-10-29 09:14:58,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:58,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:14:58,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130723636] [2020-10-29 09:14:58,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:14:58,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:14:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:14:58,557 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 8 states. [2020-10-29 09:14:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:58,752 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-29 09:14:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:14:58,753 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-29 09:14:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:58,754 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:14:58,754 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:14:58,754 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 [2020-10-29 09:14:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:14:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-29 09:14:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:14:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-29 09:14:58,764 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 20 [2020-10-29 09:14:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:58,765 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-29 09:14:58,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:14:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-29 09:14:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:14:58,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:58,766 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:58,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:14:58,767 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:58,770 INFO L82 PathProgramCache]: Analyzing trace with hash 100520868, now seen corresponding path program 1 times [2020-10-29 09:14:58,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:58,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707388039] [2020-10-29 09:14:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:58,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:59,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:59,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:59,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:59,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:59,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:14:59,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:14:59,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-29 09:14:59,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:59,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:59,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:59,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:59,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:14:59,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:59,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:59,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:59,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:59,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:59,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:59,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:14:59,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:59,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:59,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:00,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707388039] [2020-10-29 09:15:00,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:00,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:15:00,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668834512] [2020-10-29 09:15:00,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:15:00,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:00,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:15:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:15:00,008 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 7 states. [2020-10-29 09:15:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:00,194 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-10-29 09:15:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:15:00,195 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-29 09:15:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:00,196 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:15:00,196 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:15:00,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:15:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:15:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-10-29 09:15:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:15:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-29 09:15:00,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 20 [2020-10-29 09:15:00,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:00,209 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-29 09:15:00,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:15:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-29 09:15:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:15:00,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:00,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:00,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:15:00,213 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1030534352, now seen corresponding path program 1 times [2020-10-29 09:15:00,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:00,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174610591] [2020-10-29 09:15:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:00,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:00,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:01,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:01,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:15:01,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:15:01,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1064 [2020-10-29 09:15:01,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:01,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:01,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:15:01,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:01,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:15:01,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:01,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:01,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:01,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:01,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:01,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:01,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:15:01,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:01,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:01,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:01,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:01,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:01,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:01,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174610591] [2020-10-29 09:15:01,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:01,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:15:01,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566690940] [2020-10-29 09:15:01,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:15:01,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:15:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:15:01,469 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-10-29 09:15:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:01,792 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-10-29 09:15:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:15:01,792 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-29 09:15:01,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:01,793 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:15:01,794 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:15:01,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:15:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:15:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 09:15:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:15:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-29 09:15:01,807 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 22 [2020-10-29 09:15:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:01,808 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-29 09:15:01,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:15:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-29 09:15:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:15:01,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:01,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:01,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:15:01,811 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:01,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1489425582, now seen corresponding path program 1 times [2020-10-29 09:15:01,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:01,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934762640] [2020-10-29 09:15:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:01,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:02,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:02,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:15:02,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:02,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-29 09:15:02,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:02,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:02,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:15:02,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:02,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:15:02,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:02,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:02,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:02,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:02,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:02,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:02,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:02,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:02,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:02,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:02,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:02,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:02,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934762640] [2020-10-29 09:15:02,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:02,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:15:02,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872792492] [2020-10-29 09:15:02,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:15:02,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:15:02,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:15:02,562 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2020-10-29 09:15:02,705 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-29 09:15:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:03,102 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-29 09:15:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:15:03,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-29 09:15:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:03,104 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:15:03,104 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:15:03,105 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 [2020-10-29 09:15:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:15:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-29 09:15:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:15:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-29 09:15:03,112 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 22 [2020-10-29 09:15:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:03,112 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-29 09:15:03,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:15:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-29 09:15:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:15:03,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:03,113 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] [2020-10-29 09:15:03,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:15:03,114 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:03,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1487578540, now seen corresponding path program 1 times [2020-10-29 09:15:03,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:03,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871652889] [2020-10-29 09:15:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:03,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:03,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:03,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:15:03,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:03,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-29 09:15:03,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:03,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:03,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:15:03,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:03,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:15:03,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:04,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:04,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:04,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:04,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:04,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:04,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:04,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:04,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:04,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:04,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871652889] [2020-10-29 09:15:04,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:04,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:15:04,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409716289] [2020-10-29 09:15:04,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:15:04,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:15:04,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:15:04,038 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2020-10-29 09:15:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:04,473 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-29 09:15:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:15:04,474 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-29 09:15:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:04,475 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:15:04,475 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:15:04,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:15:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:15:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-29 09:15:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:15:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-29 09:15:04,483 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 22 [2020-10-29 09:15:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:04,484 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-29 09:15:04,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:15:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-29 09:15:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:15:04,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:04,485 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] [2020-10-29 09:15:04,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:15:04,485 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:04,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1242981375, now seen corresponding path program 1 times [2020-10-29 09:15:04,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:04,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027586932] [2020-10-29 09:15:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:04,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:04,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:05,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:05,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:15:05,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:05,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-10-29 09:15:05,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:05,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:15:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:15:05,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:05,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:05,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:05,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:05,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:05,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:05,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:05,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:05,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:05,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:05,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027586932] [2020-10-29 09:15:05,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:05,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:15:05,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254755281] [2020-10-29 09:15:05,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:15:05,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:15:05,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:15:05,955 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2020-10-29 09:15:06,135 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-29 09:15:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:06,362 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-10-29 09:15:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:15:06,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-29 09:15:06,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:06,363 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:15:06,363 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:15:06,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:15:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:15:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:15:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:15:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-29 09:15:06,370 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2020-10-29 09:15:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:06,370 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-29 09:15:06,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:15:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-29 09:15:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:15:06,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:06,371 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] [2020-10-29 09:15:06,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:15:06,372 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash 532025987, now seen corresponding path program 1 times [2020-10-29 09:15:06,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:06,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676309542] [2020-10-29 09:15:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:06,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:07,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:07,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:15:07,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:07,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-29 09:15:07,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:07,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:15:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:15:07,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:07,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:07,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:07,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:07,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:07,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:07,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:15:07,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:07,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:07,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:07,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676309542] [2020-10-29 09:15:07,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:07,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:15:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329951848] [2020-10-29 09:15:07,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:15:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:15:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:15:07,365 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 10 states. [2020-10-29 09:15:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:07,792 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-29 09:15:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:15:07,793 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-29 09:15:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:07,794 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:15:07,794 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:15:07,794 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 [2020-10-29 09:15:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:15:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-10-29 09:15:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:15:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-29 09:15:07,801 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 25 [2020-10-29 09:15:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:07,802 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-29 09:15:07,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:15:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-29 09:15:07,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:15:07,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:07,803 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] [2020-10-29 09:15:07,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:15:07,803 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:07,804 INFO L82 PathProgramCache]: Analyzing trace with hash 533873029, now seen corresponding path program 1 times [2020-10-29 09:15:07,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:07,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177969723] [2020-10-29 09:15:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:07,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:09,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:09,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:15:09,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:09,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1510 [2020-10-29 09:15:09,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:09,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:09,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:15:09,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:09,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:15:09,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:09,535 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-29 09:15:09,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:09,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:09,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:09,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:09,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:09,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:09,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:09,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:09,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:09,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:09,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:09,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:09,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177969723] [2020-10-29 09:15:09,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:09,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:15:09,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536550731] [2020-10-29 09:15:09,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:15:09,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:09,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:15:09,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:15:09,803 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 10 states. [2020-10-29 09:15:09,974 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-29 09:15:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:10,273 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-29 09:15:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:15:10,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-29 09:15:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:10,275 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:15:10,275 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:15:10,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:15:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:15:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-10-29 09:15:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:15:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-29 09:15:10,282 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 25 [2020-10-29 09:15:10,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:10,283 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-29 09:15:10,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:15:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-29 09:15:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:15:10,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:10,284 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:10,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:15:10,284 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:10,285 INFO L82 PathProgramCache]: Analyzing trace with hash 940445199, now seen corresponding path program 2 times [2020-10-29 09:15:10,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:10,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731467872] [2020-10-29 09:15:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:10,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:11,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:11,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:15:11,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:11,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-29 09:15:11,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:11,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:15:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:15:11,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:11,378 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-29 09:15:11,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:11,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:11,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:11,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:11,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:15:11,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:11,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:11,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:11,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731467872] [2020-10-29 09:15:11,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:11,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:15:11,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268128726] [2020-10-29 09:15:11,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:15:11,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:15:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:15:11,647 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 11 states. [2020-10-29 09:15:11,795 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-29 09:15:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:12,486 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-29 09:15:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:15:12,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-29 09:15:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:12,488 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:15:12,488 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:15:12,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:15:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:15:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-29 09:15:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:15:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-10-29 09:15:12,496 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 27 [2020-10-29 09:15:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:12,496 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-10-29 09:15:12,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:15:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-10-29 09:15:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:15:12,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:12,497 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] [2020-10-29 09:15:12,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:15:12,498 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:12,498 INFO L82 PathProgramCache]: Analyzing trace with hash 942292241, now seen corresponding path program 2 times [2020-10-29 09:15:12,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:12,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069772923] [2020-10-29 09:15:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:12,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:12,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:14,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:14,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:15:14,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:14,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-29 09:15:14,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:14,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:14,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:15:14,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:14,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:15:14,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:14,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:14,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:14,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:14,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:14,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:14,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:14,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:14,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:14,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:14,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:14,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:14,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069772923] [2020-10-29 09:15:14,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:14,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:15:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746062028] [2020-10-29 09:15:14,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:15:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:15:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:15:14,603 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 11 states. [2020-10-29 09:15:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:15,156 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-10-29 09:15:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:15:15,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-29 09:15:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:15,158 INFO L225 Difference]: With dead ends: 83 [2020-10-29 09:15:15,158 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:15:15,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:15:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:15:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-29 09:15:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:15:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-10-29 09:15:15,167 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 27 [2020-10-29 09:15:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:15,167 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-10-29 09:15:15,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:15:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-10-29 09:15:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:15:15,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:15,168 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] [2020-10-29 09:15:15,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:15:15,169 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:15,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1577667693, now seen corresponding path program 3 times [2020-10-29 09:15:15,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:15,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107041835] [2020-10-29 09:15:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:15,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:15,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:17,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:17,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:15:17,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:15:17,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2684 [2020-10-29 09:15:17,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:17,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:17,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:15:17,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:17,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:15:17,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:18,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:18,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:18,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:18,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:18,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:18,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:18,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:18,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:18,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:18,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107041835] [2020-10-29 09:15:18,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:18,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:15:18,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415604859] [2020-10-29 09:15:18,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:15:18,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:15:18,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:15:18,192 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 10 states. [2020-10-29 09:15:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:18,843 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2020-10-29 09:15:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:15:18,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 09:15:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:18,845 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:15:18,845 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:15:18,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:15:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:15:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-29 09:15:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:15:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-29 09:15:18,859 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 27 [2020-10-29 09:15:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:18,860 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-29 09:15:18,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:15:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-29 09:15:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:15:18,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:18,863 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] [2020-10-29 09:15:18,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:15:18,863 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash 807861630, now seen corresponding path program 2 times [2020-10-29 09:15:18,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:18,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737065358] [2020-10-29 09:15:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:20,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:20,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:15:20,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:20,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-29 09:15:20,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:20,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:20,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:15:20,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:20,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:15:20,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:20,311 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-29 09:15:20,536 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-29 09:15:20,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:20,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:20,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:20,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:20,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:20,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:20,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:20,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:20,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:20,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:20,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:20,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737065358] [2020-10-29 09:15:20,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:20,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:15:20,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904050329] [2020-10-29 09:15:20,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:15:20,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:20,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:15:20,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:15:20,975 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 12 states. [2020-10-29 09:15:21,283 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-29 09:15:21,624 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-29 09:15:21,816 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-29 09:15:22,022 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-29 09:15:22,367 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-29 09:15:22,625 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-29 09:15:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:22,929 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-10-29 09:15:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:15:22,930 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-29 09:15:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:22,932 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:15:22,932 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:15:22,933 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 [2020-10-29 09:15:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:15:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-29 09:15:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:15:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-10-29 09:15:22,944 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 30 [2020-10-29 09:15:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:22,945 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-10-29 09:15:22,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:15:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-10-29 09:15:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:15:22,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:22,946 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] [2020-10-29 09:15:22,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:15:22,946 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash 809708672, now seen corresponding path program 2 times [2020-10-29 09:15:22,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:22,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803090797] [2020-10-29 09:15:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:24,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:24,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:15:24,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:24,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1739 [2020-10-29 09:15:24,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:24,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:24,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:15:24,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:24,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:15:24,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:25,054 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-29 09:15:25,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:25,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:25,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:25,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:25,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:25,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:25,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:25,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:25,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:25,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803090797] [2020-10-29 09:15:25,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:25,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:15:25,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58108895] [2020-10-29 09:15:25,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:15:25,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:15:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:15:25,485 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 12 states. [2020-10-29 09:15:25,819 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 78 [2020-10-29 09:15:26,291 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-10-29 09:15:26,486 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-29 09:15:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:27,361 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2020-10-29 09:15:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:15:27,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-29 09:15:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:27,364 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:15:27,364 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:15:27,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:15:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:15:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-29 09:15:27,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:15:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-10-29 09:15:27,374 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 30 [2020-10-29 09:15:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:27,375 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-10-29 09:15:27,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:15:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-10-29 09:15:27,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:15:27,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:27,376 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] [2020-10-29 09:15:27,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:15:27,376 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1712098304, now seen corresponding path program 3 times [2020-10-29 09:15:27,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:27,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576290336] [2020-10-29 09:15:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:27,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:28,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:28,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:29,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:29,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:15:29,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:15:29,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2544 [2020-10-29 09:15:29,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:29,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:29,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:15:29,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:29,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:15:30,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:30,258 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-29 09:15:30,499 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-29 09:15:30,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:30,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:30,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:30,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:30,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:15:30,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:30,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:30,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:30,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576290336] [2020-10-29 09:15:30,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:30,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:15:30,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546746008] [2020-10-29 09:15:30,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:15:30,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:30,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:15:30,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:15:30,799 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 11 states. [2020-10-29 09:15:31,047 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-10-29 09:15:31,385 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2020-10-29 09:15:31,535 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-29 09:15:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:31,721 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-10-29 09:15:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:15:31,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:15:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:31,722 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:15:31,723 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:15:31,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:15:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:15:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-29 09:15:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:15:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-10-29 09:15:31,733 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 30 [2020-10-29 09:15:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:31,733 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-10-29 09:15:31,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:15:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-10-29 09:15:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:15:31,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:31,734 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:31,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:15:31,735 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:31,735 INFO L82 PathProgramCache]: Analyzing trace with hash -176531086, now seen corresponding path program 3 times [2020-10-29 09:15:31,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:31,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340203323] [2020-10-29 09:15:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:32,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:34,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:34,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:15:34,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:15:34,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2879 [2020-10-29 09:15:34,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:34,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:15:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:15:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:35,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:35,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:35,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:35,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340203323] [2020-10-29 09:15:35,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:35,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:15:35,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532526626] [2020-10-29 09:15:35,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:15:35,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:15:35,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:15:35,157 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 10 states. [2020-10-29 09:15:35,306 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 09:15:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:35,651 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-10-29 09:15:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:15:35,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-29 09:15:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:35,652 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:15:35,652 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 09:15:35,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:15:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 09:15:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-29 09:15:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:15:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-29 09:15:35,662 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 32 [2020-10-29 09:15:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:35,662 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-29 09:15:35,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:15:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-29 09:15:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:15:35,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:35,663 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] [2020-10-29 09:15:35,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:15:35,664 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1600323318, now seen corresponding path program 4 times [2020-10-29 09:15:35,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:35,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869951760] [2020-10-29 09:15:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:35,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:36,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:37,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:37,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:15:37,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:37,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2264 [2020-10-29 09:15:37,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:37,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:15:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:15:37,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:38,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:38,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:38,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:38,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:38,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:38,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:15:38,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:38,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:38,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:38,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869951760] [2020-10-29 09:15:38,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:38,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:15:38,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193117608] [2020-10-29 09:15:38,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:15:38,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:15:38,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:15:38,616 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 13 states. [2020-10-29 09:15:38,806 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 09:15:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:39,264 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-10-29 09:15:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:15:39,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-29 09:15:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:39,265 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:15:39,266 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:15:39,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:15:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:15:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:15:39,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:15:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-29 09:15:39,274 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 32 [2020-10-29 09:15:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:39,274 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-29 09:15:39,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:15:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-29 09:15:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:15:39,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:39,276 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] [2020-10-29 09:15:39,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:15:39,277 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -536299677, now seen corresponding path program 4 times [2020-10-29 09:15:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:39,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892267574] [2020-10-29 09:15:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:39,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:41,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:41,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:15:41,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:41,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1770 [2020-10-29 09:15:41,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:41,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:41,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:15:41,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:41,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:15:41,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:41,424 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-29 09:15:41,584 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-29 09:15:41,729 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-29 09:15:41,873 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-29 09:15:42,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:42,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:42,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:42,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892267574] [2020-10-29 09:15:42,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:42,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:15:42,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728287483] [2020-10-29 09:15:42,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:15:42,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:42,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:15:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:15:42,362 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 14 states. [2020-10-29 09:15:42,685 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 71 [2020-10-29 09:15:43,021 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-29 09:15:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:43,707 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-29 09:15:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:15:43,707 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 09:15:43,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:43,708 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:15:43,708 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:15:43,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:15:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:15:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-29 09:15:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:15:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-29 09:15:43,722 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2020-10-29 09:15:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:43,723 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-29 09:15:43,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:15:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-29 09:15:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:15:43,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:43,723 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] [2020-10-29 09:15:43,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:15:43,724 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash -534452635, now seen corresponding path program 3 times [2020-10-29 09:15:43,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:43,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17505460] [2020-10-29 09:15:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:43,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:44,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:46,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2519 [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:15:46,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:46,554 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-29 09:15:46,678 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-29 09:15:46,814 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 09:15:46,942 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-29 09:15:47,093 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-29 09:15:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:47,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:47,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:47,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:47,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:15:47,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:47,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:47,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17505460] [2020-10-29 09:15:47,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:47,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:15:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142740163] [2020-10-29 09:15:47,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:15:47,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:47,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:15:47,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:15:47,476 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 14 states. [2020-10-29 09:15:47,820 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 69 [2020-10-29 09:15:48,268 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-29 09:15:48,626 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-29 09:15:48,828 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-29 09:15:49,031 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-29 09:15:49,224 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-29 09:15:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:49,628 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-29 09:15:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:15:49,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 09:15:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:49,632 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:15:49,632 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:15:49,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:15:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:15:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-29 09:15:49,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:15:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-29 09:15:49,639 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2020-10-29 09:15:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:49,640 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-29 09:15:49,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:15:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-29 09:15:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:15:49,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:49,640 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] [2020-10-29 09:15:49,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:15:49,641 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1238707685, now seen corresponding path program 5 times [2020-10-29 09:15:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:49,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272721671] [2020-10-29 09:15:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:49,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:51,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:51,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:15:51,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:51,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1335 [2020-10-29 09:15:51,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:51,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:15:51,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:51,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:15:51,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:51,417 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-29 09:15:51,565 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-29 09:15:51,696 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-29 09:15:52,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:52,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:52,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:52,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:52,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:15:52,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:52,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:52,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:52,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:52,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272721671] [2020-10-29 09:15:52,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:52,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:15:52,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135214497] [2020-10-29 09:15:52,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:15:52,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:52,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:15:52,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:15:52,204 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 14 states. [2020-10-29 09:15:52,595 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 68 [2020-10-29 09:15:53,025 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-29 09:15:53,286 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-29 09:15:54,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:54,047 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-29 09:15:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:15:54,048 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 09:15:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:54,049 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:15:54,049 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:15:54,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:15:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:15:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-29 09:15:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:15:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-29 09:15:54,056 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2020-10-29 09:15:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:54,056 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-29 09:15:54,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:15:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-29 09:15:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:15:54,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:54,057 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] [2020-10-29 09:15:54,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:15:54,058 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1240554727, now seen corresponding path program 4 times [2020-10-29 09:15:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:54,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315941085] [2020-10-29 09:15:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:54,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:55,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:57,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:57,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:15:57,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:57,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2915 [2020-10-29 09:15:57,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:57,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:57,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:15:57,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:57,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:15:57,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:57,408 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-29 09:15:58,160 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-29 09:15:58,704 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-29 09:15:59,145 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-29 09:15:59,404 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-29 09:15:59,593 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-29 09:16:00,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:00,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:00,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:00,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:00,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:00,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:16:00,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:00,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:00,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:00,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315941085] [2020-10-29 09:16:00,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:00,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:16:00,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793911019] [2020-10-29 09:16:00,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:16:00,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:00,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:16:00,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:16:00,090 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 15 states. [2020-10-29 09:16:00,542 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 67 [2020-10-29 09:16:01,049 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2020-10-29 09:16:01,515 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 74 [2020-10-29 09:16:01,974 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-10-29 09:16:02,329 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-29 09:16:02,676 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-10-29 09:16:03,021 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-10-29 09:16:03,313 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-29 09:16:03,594 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-29 09:16:03,881 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-29 09:16:04,154 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-29 09:16:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:04,643 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-29 09:16:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:16:04,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-29 09:16:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:04,644 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:16:04,644 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:16:04,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:16:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:16:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-10-29 09:16:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:16:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-29 09:16:04,651 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2020-10-29 09:16:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:04,652 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-29 09:16:04,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:16:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-29 09:16:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:16:04,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:04,653 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] [2020-10-29 09:16:04,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:16:04,653 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash 739796126, now seen corresponding path program 6 times [2020-10-29 09:16:04,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:04,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137220959] [2020-10-29 09:16:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:04,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:05,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:07,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:09,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:16:09,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:09,998 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-29 09:16:10,231 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-29 09:16:10,360 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-29 09:16:10,508 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-29 09:16:11,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:11,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:11,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:11,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:11,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:11,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:16:11,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:11,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:11,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:11,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137220959] [2020-10-29 09:16:11,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:11,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:16:11,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678519028] [2020-10-29 09:16:11,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:16:11,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:16:11,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:16:11,063 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 15 states. [2020-10-29 09:16:11,375 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2020-10-29 09:16:11,882 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-29 09:16:12,317 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-29 09:16:12,491 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-29 09:16:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:12,889 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-29 09:16:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:16:12,890 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:16:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:12,891 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:16:12,891 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:16:12,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:16:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:16:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 09:16:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:16:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-29 09:16:12,899 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 40 [2020-10-29 09:16:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:12,899 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-29 09:16:12,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:16:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-29 09:16:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:16:12,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:12,900 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] [2020-10-29 09:16:12,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:16:12,900 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1780163808, now seen corresponding path program 7 times [2020-10-29 09:16:12,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:12,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997813797] [2020-10-29 09:16:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:13,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:14,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:14,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:16:14,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:14,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1848 [2020-10-29 09:16:14,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:14,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:14,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:16:14,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:16:14,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:16:14,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:15,065 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-29 09:16:15,184 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-29 09:16:15,335 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-29 09:16:15,472 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-29 09:16:15,669 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-29 09:16:15,852 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-29 09:16:16,014 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-29 09:16:16,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:16,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:16,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:16,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:16,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:16,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:16:16,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:16,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:16,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:16,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997813797] [2020-10-29 09:16:16,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:16,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:16:16,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894216161] [2020-10-29 09:16:16,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:16:16,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:16,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:16:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:16:16,482 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 16 states. [2020-10-29 09:16:16,814 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-10-29 09:16:17,180 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-29 09:16:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:17,945 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-29 09:16:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:16:17,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-29 09:16:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:17,947 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:16:17,947 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:16:17,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:16:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:16:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-29 09:16:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:16:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-29 09:16:17,960 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 40 [2020-10-29 09:16:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:17,960 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-29 09:16:17,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:16:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-29 09:16:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:16:17,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:17,961 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] [2020-10-29 09:16:17,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:16:17,961 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1778316766, now seen corresponding path program 5 times [2020-10-29 09:16:17,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:17,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8579280] [2020-10-29 09:16:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:18,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:19,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:21,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:21,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:16:21,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:16:21,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3438 [2020-10-29 09:16:21,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:21,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:21,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:16:21,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:16:21,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:16:21,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:21,846 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-29 09:16:22,094 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-29 09:16:22,300 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-29 09:16:22,470 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-29 09:16:23,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:23,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:23,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:23,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:23,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:23,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:16:23,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:23,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:23,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:23,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8579280] [2020-10-29 09:16:23,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:23,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:16:23,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066367995] [2020-10-29 09:16:23,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:16:23,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:23,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:16:23,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:16:23,238 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 16 states. [2020-10-29 09:16:23,598 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 63 [2020-10-29 09:16:24,040 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 70 [2020-10-29 09:16:24,344 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-29 09:16:24,531 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 09:16:24,712 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-29 09:16:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:25,279 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-29 09:16:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:16:25,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-29 09:16:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:25,281 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:16:25,281 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:16:25,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:16:25,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:16:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-29 09:16:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:16:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-29 09:16:25,288 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 40 [2020-10-29 09:16:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:25,288 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-29 09:16:25,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:16:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-29 09:16:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:16:25,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:25,289 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] [2020-10-29 09:16:25,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:16:25,289 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 997961564, now seen corresponding path program 8 times [2020-10-29 09:16:25,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:25,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287661854] [2020-10-29 09:16:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:25,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:26,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:26,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:16:26,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:26,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1642 [2020-10-29 09:16:26,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:26,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:26,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:16:26,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:16:26,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:16:26,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:27,237 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-29 09:16:27,379 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-29 09:16:27,576 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-29 09:16:27,759 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-29 09:16:27,919 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-29 09:16:28,077 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-29 09:16:28,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:28,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:28,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:28,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287661854] [2020-10-29 09:16:28,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:28,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:16:28,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247211609] [2020-10-29 09:16:28,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:16:28,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:28,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:16:28,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:16:28,617 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 16 states. [2020-10-29 09:16:28,908 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 65 [2020-10-29 09:16:29,255 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-29 09:16:29,506 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-29 09:16:29,673 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-29 09:16:29,845 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-29 09:16:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:30,586 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-29 09:16:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:16:30,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-29 09:16:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:30,588 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:16:30,588 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:16:30,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:16:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:16:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-29 09:16:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:16:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-29 09:16:30,595 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 40 [2020-10-29 09:16:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:30,595 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-29 09:16:30,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:16:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-29 09:16:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:16:30,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:30,596 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] [2020-10-29 09:16:30,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:16:30,596 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash 999808606, now seen corresponding path program 6 times [2020-10-29 09:16:30,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:30,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771995827] [2020-10-29 09:16:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:30,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:31,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:33,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:34,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:35,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:35,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:16:35,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:16:35,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:16:35,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:35,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:35,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:16:35,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:16:35,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:16:35,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:35,921 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-29 09:16:36,045 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2020-10-29 09:16:36,272 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2020-10-29 09:16:36,549 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-29 09:16:36,782 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-29 09:16:36,969 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-29 09:16:37,153 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-29 09:16:37,300 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-29 09:16:37,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:37,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:37,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:37,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:37,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:37,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:16:37,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:37,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:37,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:37,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771995827] [2020-10-29 09:16:37,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:37,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:16:37,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358157981] [2020-10-29 09:16:37,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:16:37,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:16:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:16:37,927 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 17 states. [2020-10-29 09:16:38,278 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 69 [2020-10-29 09:16:38,776 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-10-29 09:16:39,125 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-29 09:16:39,310 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-29 09:16:39,485 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-29 09:16:39,802 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-29 09:16:39,988 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-29 09:16:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:40,558 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-10-29 09:16:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:16:40,559 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-29 09:16:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:40,560 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:16:40,560 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 09:16:40,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:16:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 09:16:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-29 09:16:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:16:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-10-29 09:16:40,568 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 40 [2020-10-29 09:16:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:40,568 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-10-29 09:16:40,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:16:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-10-29 09:16:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:16:40,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:40,569 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] [2020-10-29 09:16:40,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:16:40,569 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1520151328, now seen corresponding path program 7 times [2020-10-29 09:16:40,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:40,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073017999] [2020-10-29 09:16:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:41,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:42,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:43,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:45,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:45,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:45,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:16:45,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:16:45,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 09:16:45,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:45,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:45,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:16:45,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:16:45,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:16:45,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:45,970 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-29 09:16:46,094 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-29 09:16:46,243 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-29 09:16:46,368 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-29 09:16:46,508 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-29 09:16:47,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:47,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:47,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:47,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:47,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:47,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:16:47,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:47,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:47,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073017999] [2020-10-29 09:16:47,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:47,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:16:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393924073] [2020-10-29 09:16:47,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:16:47,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:16:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:16:47,053 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 15 states. [2020-10-29 09:16:47,382 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 70 [2020-10-29 09:16:47,692 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2020-10-29 09:16:47,962 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2020-10-29 09:16:48,150 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-29 09:16:48,314 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-29 09:16:48,647 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-29 09:16:48,802 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-29 09:16:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:49,090 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-10-29 09:16:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:16:49,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:16:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:49,092 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:16:49,092 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:16:49,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:16:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:16:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:16:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:16:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-29 09:16:49,100 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 40 [2020-10-29 09:16:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:49,100 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-29 09:16:49,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:16:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-29 09:16:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:16:49,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:49,101 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:16:49,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:16:49,101 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1143075071, now seen corresponding path program 9 times [2020-10-29 09:16:49,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:49,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617593996] [2020-10-29 09:16:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:54,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:54,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:16:54,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:16:54,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-29 09:16:54,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:54,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:54,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:16:54,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:16:54,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:16:54,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:54,619 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-29 09:16:54,767 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-29 09:16:54,930 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 47 [2020-10-29 09:16:55,102 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2020-10-29 09:16:55,262 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-29 09:16:55,413 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-29 09:16:55,582 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-29 09:16:55,869 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-29 09:16:56,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:56,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:56,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:56,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:56,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:56,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:16:56,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:56,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:56,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:56,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:56,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:56,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:56,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617593996] [2020-10-29 09:16:56,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:56,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:16:56,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901135732] [2020-10-29 09:16:56,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:16:56,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:56,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:16:56,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:16:56,232 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 17 states. [2020-10-29 09:16:56,663 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 78 [2020-10-29 09:16:57,291 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 85 [2020-10-29 09:16:57,652 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-29 09:16:57,833 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-29 09:16:58,041 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-29 09:16:58,307 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-29 09:16:58,483 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-29 09:16:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:58,765 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-10-29 09:16:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:16:58,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-29 09:16:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:58,768 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:16:58,769 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:16:58,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:16:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:16:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 09:16:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:16:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-29 09:16:58,775 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 45 [2020-10-29 09:16:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:58,776 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-29 09:16:58,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:16:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-29 09:16:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:16:58,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:58,776 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:16:58,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:16:58,777 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 631932291, now seen corresponding path program 10 times [2020-10-29 09:16:58,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:58,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55763137] [2020-10-29 09:16:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:58,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:02,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:02,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:02,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:02,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3212 [2020-10-29 09:17:02,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:02,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:02,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:17:02,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:02,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:17:02,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:02,344 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-29 09:17:02,480 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-29 09:17:02,660 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-29 09:17:02,823 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-29 09:17:03,130 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-29 09:17:03,340 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-29 09:17:03,589 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-29 09:17:03,772 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-29 09:17:03,969 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-29 09:17:04,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:04,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:04,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:04,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:04,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:04,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:17:04,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:04,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:04,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:04,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:04,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:04,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:04,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55763137] [2020-10-29 09:17:04,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:04,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:17:04,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801439468] [2020-10-29 09:17:04,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:17:04,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:17:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:17:04,524 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 18 states. [2020-10-29 09:17:04,966 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 60 [2020-10-29 09:17:05,406 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-10-29 09:17:06,172 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-29 09:17:06,363 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-29 09:17:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:07,159 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-29 09:17:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:17:07,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-29 09:17:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:07,161 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:17:07,161 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:17:07,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:17:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:17:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-29 09:17:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:17:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-29 09:17:07,170 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 45 [2020-10-29 09:17:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:07,170 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-29 09:17:07,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:17:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-29 09:17:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:17:07,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:07,171 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:07,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:17:07,171 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:07,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:07,171 INFO L82 PathProgramCache]: Analyzing trace with hash 633779333, now seen corresponding path program 8 times [2020-10-29 09:17:07,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:07,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352899487] [2020-10-29 09:17:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:12,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:12,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:12,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:12,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:17:12,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:12,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:12,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:17:12,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:12,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:17:12,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:12,676 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-29 09:17:12,821 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-29 09:17:12,997 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-29 09:17:13,159 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-29 09:17:13,316 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-10-29 09:17:13,476 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-29 09:17:13,638 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-29 09:17:14,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:14,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:14,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:14,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:14,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:17:14,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:14,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:14,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352899487] [2020-10-29 09:17:14,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:14,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:17:14,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139994485] [2020-10-29 09:17:14,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:17:14,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:14,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:17:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:17:14,318 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 18 states. [2020-10-29 09:17:14,702 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 74 [2020-10-29 09:17:15,322 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 78 [2020-10-29 09:17:15,687 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-29 09:17:15,894 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-29 09:17:16,100 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-29 09:17:16,495 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-29 09:17:16,664 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-29 09:17:16,844 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-29 09:17:17,022 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-29 09:17:17,195 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-29 09:17:17,799 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-29 09:17:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:18,477 INFO L93 Difference]: Finished difference Result 135 states and 175 transitions. [2020-10-29 09:17:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:17:18,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-29 09:17:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:18,479 INFO L225 Difference]: With dead ends: 135 [2020-10-29 09:17:18,479 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 09:17:18,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:17:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 09:17:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2020-10-29 09:17:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 09:17:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2020-10-29 09:17:18,490 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 45 [2020-10-29 09:17:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:18,490 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2020-10-29 09:17:18,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:17:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2020-10-29 09:17:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:17:18,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:18,491 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:18,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:17:18,491 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:18,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:18,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1305378885, now seen corresponding path program 11 times [2020-10-29 09:17:18,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:18,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351056243] [2020-10-29 09:17:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:19,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:23,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:23,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:23,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5323 [2020-10-29 09:17:23,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:23,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:17:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:17:23,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:24,292 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-29 09:17:24,462 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-29 09:17:24,651 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-29 09:17:24,834 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-29 09:17:25,011 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-29 09:17:25,167 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-29 09:17:25,337 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-29 09:17:25,478 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-29 09:17:25,626 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-29 09:17:26,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:26,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:26,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:26,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351056243] [2020-10-29 09:17:26,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:26,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:17:26,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131079882] [2020-10-29 09:17:26,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:17:26,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:26,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:17:26,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:17:26,189 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand 18 states. [2020-10-29 09:17:26,628 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 78 [2020-10-29 09:17:27,180 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-29 09:17:27,448 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-29 09:17:27,628 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-29 09:17:27,808 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-29 09:17:28,039 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-29 09:17:28,218 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-29 09:17:28,396 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-29 09:17:28,803 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-29 09:17:29,003 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-29 09:17:29,288 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-29 09:17:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:29,847 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-29 09:17:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:17:29,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-29 09:17:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:29,849 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:17:29,849 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:17:29,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:17:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:17:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2020-10-29 09:17:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-29 09:17:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2020-10-29 09:17:29,861 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 45 [2020-10-29 09:17:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:29,861 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2020-10-29 09:17:29,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:17:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2020-10-29 09:17:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:17:29,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:29,862 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:29,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:17:29,862 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1307225927, now seen corresponding path program 9 times [2020-10-29 09:17:29,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:29,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518729701] [2020-10-29 09:17:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:30,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:31,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:32,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:34,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:35,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5438 [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:17:35,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:35,789 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-29 09:17:35,991 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2020-10-29 09:17:36,328 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-29 09:17:36,607 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2020-10-29 09:17:36,905 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 64 [2020-10-29 09:17:37,155 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2020-10-29 09:17:37,421 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-29 09:17:37,624 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-29 09:17:37,855 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-29 09:17:38,115 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-29 09:17:38,306 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-29 09:17:38,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:38,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:38,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:38,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:38,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:38,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:17:38,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:38,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:38,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:38,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518729701] [2020-10-29 09:17:38,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:38,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:17:38,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433931291] [2020-10-29 09:17:38,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:17:38,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:17:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:17:38,732 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand 18 states. [2020-10-29 09:17:39,243 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 72 [2020-10-29 09:17:39,799 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 74 [2020-10-29 09:17:40,259 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 76 [2020-10-29 09:17:40,534 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-29 09:17:40,758 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:17:41,040 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 09:17:41,379 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-29 09:17:41,701 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2020-10-29 09:17:42,099 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-29 09:17:42,417 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-29 09:17:42,634 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-29 09:17:42,922 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-29 09:17:43,173 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-29 09:17:43,518 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-29 09:17:44,167 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-29 09:17:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:44,318 INFO L93 Difference]: Finished difference Result 194 states and 259 transitions. [2020-10-29 09:17:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:17:44,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-29 09:17:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:44,320 INFO L225 Difference]: With dead ends: 194 [2020-10-29 09:17:44,320 INFO L226 Difference]: Without dead ends: 177 [2020-10-29 09:17:44,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:17:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-29 09:17:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2020-10-29 09:17:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 09:17:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 218 transitions. [2020-10-29 09:17:44,337 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 218 transitions. Word has length 45 [2020-10-29 09:17:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:44,337 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 218 transitions. [2020-10-29 09:17:44,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:17:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 218 transitions. [2020-10-29 09:17:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:17:44,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:44,338 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:44,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:17:44,338 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1214581049, now seen corresponding path program 12 times [2020-10-29 09:17:44,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:44,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317642645] [2020-10-29 09:17:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:44,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:47,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:47,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:47,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:47,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3115 [2020-10-29 09:17:47,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:47,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:47,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:17:47,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:47,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:17:47,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:47,856 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-29 09:17:47,996 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-29 09:17:48,177 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-29 09:17:48,349 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-29 09:17:48,534 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-29 09:17:48,712 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-29 09:17:48,907 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-29 09:17:49,085 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-29 09:17:49,223 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 09:17:49,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:49,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:49,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:49,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:49,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:49,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:17:49,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:49,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:49,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:49,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:49,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:49,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:49,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317642645] [2020-10-29 09:17:49,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:49,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:17:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002109415] [2020-10-29 09:17:49,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:17:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:17:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:17:49,800 INFO L87 Difference]: Start difference. First operand 164 states and 218 transitions. Second operand 18 states. [2020-10-29 09:17:50,206 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 64 [2020-10-29 09:17:50,582 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2020-10-29 09:17:50,926 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 57 [2020-10-29 09:17:51,149 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-29 09:17:51,373 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-29 09:17:51,622 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-29 09:17:51,799 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-29 09:17:51,988 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-29 09:17:52,190 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 09:17:52,348 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-29 09:17:52,506 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:17:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:53,078 INFO L93 Difference]: Finished difference Result 179 states and 237 transitions. [2020-10-29 09:17:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:17:53,079 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-29 09:17:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:53,080 INFO L225 Difference]: With dead ends: 179 [2020-10-29 09:17:53,080 INFO L226 Difference]: Without dead ends: 175 [2020-10-29 09:17:53,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:17:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-29 09:17:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 169. [2020-10-29 09:17:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-29 09:17:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 224 transitions. [2020-10-29 09:17:53,100 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 224 transitions. Word has length 45 [2020-10-29 09:17:53,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:53,101 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 224 transitions. [2020-10-29 09:17:53,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:17:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 224 transitions. [2020-10-29 09:17:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:17:53,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:53,102 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:53,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:17:53,102 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1212734007, now seen corresponding path program 10 times [2020-10-29 09:17:53,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:53,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966639546] [2020-10-29 09:17:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:53,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:58,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:58,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:58,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:17:58,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-29 09:17:58,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:58,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:58,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:17:58,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:58,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:17:58,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:58,596 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-29 09:17:58,751 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-29 09:17:58,897 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-29 09:17:59,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:59,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:59,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:17:59,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966639546] [2020-10-29 09:17:59,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:59,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:17:59,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447331916] [2020-10-29 09:17:59,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:17:59,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:17:59,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:17:59,355 INFO L87 Difference]: Start difference. First operand 169 states and 224 transitions. Second operand 15 states. [2020-10-29 09:17:59,650 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 80 [2020-10-29 09:18:00,200 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 82 [2020-10-29 09:18:00,496 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2020-10-29 09:18:00,759 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-10-29 09:18:01,028 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-10-29 09:18:01,306 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-10-29 09:18:01,571 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-29 09:18:01,859 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2020-10-29 09:18:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:01,978 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2020-10-29 09:18:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:18:01,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-29 09:18:01,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:01,981 INFO L225 Difference]: With dead ends: 237 [2020-10-29 09:18:01,981 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:18:01,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:18:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:18:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2020-10-29 09:18:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-29 09:18:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 196 transitions. [2020-10-29 09:18:02,003 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 196 transitions. Word has length 45 [2020-10-29 09:18:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:02,004 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 196 transitions. [2020-10-29 09:18:02,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:18:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 196 transitions. [2020-10-29 09:18:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:18:02,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:02,005 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:02,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:18:02,005 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 158334, now seen corresponding path program 13 times [2020-10-29 09:18:02,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:02,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095392873] [2020-10-29 09:18:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:02,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4427 [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:18:06,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:07,438 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 40 [2020-10-29 09:18:07,910 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2020-10-29 09:18:08,444 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2020-10-29 09:18:08,878 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 59 [2020-10-29 09:18:09,320 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 61 [2020-10-29 09:18:09,562 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2020-10-29 09:18:09,998 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-29 09:18:10,195 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-29 09:18:10,618 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-29 09:18:10,808 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-29 09:18:10,973 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-29 09:18:11,275 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-29 09:18:11,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:11,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:11,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:11,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:11,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:11,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:11,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:11,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:11,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:11,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:11,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:11,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:11,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095392873] [2020-10-29 09:18:11,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:11,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:18:11,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676558478] [2020-10-29 09:18:11,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:18:11,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:11,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:18:11,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:18:11,713 INFO L87 Difference]: Start difference. First operand 153 states and 196 transitions. Second operand 20 states. [2020-10-29 09:18:12,240 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 70 [2020-10-29 09:18:12,845 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2020-10-29 09:18:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:14,753 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2020-10-29 09:18:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:18:14,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-29 09:18:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:14,755 INFO L225 Difference]: With dead ends: 164 [2020-10-29 09:18:14,755 INFO L226 Difference]: Without dead ends: 160 [2020-10-29 09:18:14,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:18:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-29 09:18:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-29 09:18:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-29 09:18:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 202 transitions. [2020-10-29 09:18:14,776 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 202 transitions. Word has length 50 [2020-10-29 09:18:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:14,777 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 202 transitions. [2020-10-29 09:18:14,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:18:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 202 transitions. [2020-10-29 09:18:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:18:14,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:14,778 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:14,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:18:14,778 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:14,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1775165696, now seen corresponding path program 14 times [2020-10-29 09:18:14,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:14,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94045626] [2020-10-29 09:18:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:15,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:17,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:19,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:21,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:21,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:18:21,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:18:21,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6115 [2020-10-29 09:18:21,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:21,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:21,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:18:21,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:18:21,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:18:21,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:21,444 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-29 09:18:21,615 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-29 09:18:21,856 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2020-10-29 09:18:22,046 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2020-10-29 09:18:22,248 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-29 09:18:22,415 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-29 09:18:22,701 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-10-29 09:18:22,958 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-29 09:18:23,285 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2020-10-29 09:18:23,512 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-10-29 09:18:23,747 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-29 09:18:23,921 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-29 09:18:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:24,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:24,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:24,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94045626] [2020-10-29 09:18:24,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:24,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:18:24,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477745392] [2020-10-29 09:18:24,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:18:24,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:18:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:18:24,430 INFO L87 Difference]: Start difference. First operand 158 states and 202 transitions. Second operand 19 states. [2020-10-29 09:18:24,807 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 69 [2020-10-29 09:18:25,296 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 70