/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/running_example.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:14:43,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:14:43,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:14:43,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:14:43,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:14:43,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:14:43,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:14:43,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:14:43,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:14:43,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:14:43,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:14:43,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:14:43,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:14:43,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:14:43,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:14:43,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:14:43,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:14:43,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:14:43,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:14:43,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:14:43,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:14:43,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:14:43,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:14:43,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:14:43,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:14:43,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:14:43,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:14:43,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:14:43,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:14:43,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:14:43,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:14:43,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:14:43,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:14:43,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:14:43,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:14:43,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:14:43,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:14:43,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:14:43,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:14:43,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:14:43,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:14:43,484 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 09:14:43,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:14:43,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:14:43,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:14:43,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:14:43,546 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:14:43,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:14:43,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:14:43,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:14:43,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:14:43,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:14:43,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:14:43,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:14:43,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:14:43,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:14:43,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:14:43,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:14:43,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:14:43,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:14:43,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:14:43,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:14:43,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:14:43,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:14:43,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:14:43,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:14:43,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:14:43,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:14:43,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:14:43,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:14:43,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:14:43,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:14:44,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:14:44,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:14:44,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:14:44,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:14:44,045 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:14:44,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/running_example.i [2020-10-29 09:14:44,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c634e2b/a96f59bedaae4ef9a93ead39358b4a3d/FLAGcc15e0c9b [2020-10-29 09:14:44,841 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:14:44,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/running_example.i [2020-10-29 09:14:44,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c634e2b/a96f59bedaae4ef9a93ead39358b4a3d/FLAGcc15e0c9b [2020-10-29 09:14:45,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c634e2b/a96f59bedaae4ef9a93ead39358b4a3d [2020-10-29 09:14:45,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:14:45,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:14:45,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:14:45,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:14:45,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:14:45,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b08df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45, skipping insertion in model container [2020-10-29 09:14:45,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:14:45,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:14:45,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:14:45,636 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:14:45,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:14:45,793 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:14:45,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45 WrapperNode [2020-10-29 09:14:45,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:14:45,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:14:45,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:14:45,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:14:45,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (1/1) ... [2020-10-29 09:14:45,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:14:45,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:14:45,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:14:45,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:14:45,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (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 09:14:45,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:14:45,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:14:45,976 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:14:45,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:14:45,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:14:45,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:14:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:14:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:14:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:14:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:14:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:14:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:14:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:14:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:14:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:14:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:14:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:14:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:14:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:14:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:14:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:14:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:14:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:14:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:14:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:14:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:14:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:14:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:14:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:14:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:14:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:14:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:14:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:14:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:14:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:14:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:14:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:14:45,982 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:14:45,982 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:14:45,982 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:14:45,982 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:14:45,982 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:14:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:14:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:14:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:14:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:14:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:14:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:14:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:14:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:14:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:14:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:14:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:14:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:14:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:14:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:14:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:14:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:14:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:14:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:14:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:14:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:14:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:14:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:14:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:14:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:14:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:14:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:14:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:14:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:14:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:14:45,987 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:14:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:14:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:14:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:14:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:14:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:14:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:14:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:14:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:14:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:14:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:14:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:14:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:14:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:14:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:14:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:14:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:14:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:14:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:14:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:14:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:14:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:14:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:14:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:14:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:14:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:14:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:14:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:14:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:14:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:14:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:14:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:14:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:14:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:14:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:14:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:14:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:14:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:14:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:14:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:14:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:14:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:14:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:14:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:14:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:14:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:14:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:14:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:14:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:14:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:14:46,745 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:14:46,745 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-29 09:14:46,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:14:46 BoogieIcfgContainer [2020-10-29 09:14:46,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:14:46,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:14:46,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:14:46,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:14:46,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:14:45" (1/3) ... [2020-10-29 09:14:46,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24eaea42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:14:46, skipping insertion in model container [2020-10-29 09:14:46,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:45" (2/3) ... [2020-10-29 09:14:46,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24eaea42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:14:46, skipping insertion in model container [2020-10-29 09:14:46,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:14:46" (3/3) ... [2020-10-29 09:14:46,757 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2020-10-29 09:14:46,769 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:14:46,774 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:14:46,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:14:46,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:14:46,817 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:14:46,817 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:14:46,817 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:14:46,817 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:14:46,817 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:14:46,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:14:46,818 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:14:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-29 09:14:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:14:46,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:46,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:46,842 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1042609471, now seen corresponding path program 1 times [2020-10-29 09:14:46,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:46,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62439255] [2020-10-29 09:14:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:47,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:47,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:47,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:47,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:14:47,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:47,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-29 09:14:47,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:47,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:47,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:14:47,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:14:47,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:14:47,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:47,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:47,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:47,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:47,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:47,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:14:47,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:47,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:47,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:47,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:47,738 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 09:14:47,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62439255] [2020-10-29 09:14:47,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:14:47,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:14:47,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947509868] [2020-10-29 09:14:47,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:14:47,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:14:47,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:14:47,794 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-10-29 09:14:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:48,058 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2020-10-29 09:14:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:14:48,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-29 09:14:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:48,076 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:14:48,077 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:14:48,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:14:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:14:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-29 09:14:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:14:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-10-29 09:14:48,124 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-10-29 09:14:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:48,124 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-10-29 09:14:48,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:14:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-10-29 09:14:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:14:48,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:48,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:48,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:14:48,126 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1824486671, now seen corresponding path program 1 times [2020-10-29 09:14:48,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:48,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727154452] [2020-10-29 09:14:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:48,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:48,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:48,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:14:48,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:48,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-29 09:14:48,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:48,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:14:48,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:48,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:48,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:48,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:48,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:48,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:48,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:14:48,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:48,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:48,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:48,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727154452] [2020-10-29 09:14:48,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:48,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:14:48,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132408595] [2020-10-29 09:14:48,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:14:48,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:14:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:14:48,607 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 7 states. [2020-10-29 09:14:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:48,957 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-29 09:14:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:14:48,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-29 09:14:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:48,960 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:14:48,960 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:14:48,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:14:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:14:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-29 09:14:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:14:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-10-29 09:14:48,971 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2020-10-29 09:14:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:48,971 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-10-29 09:14:48,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:14:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-10-29 09:14:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:14:48,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:48,973 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 09:14:48,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:14:48,973 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash -940007470, now seen corresponding path program 1 times [2020-10-29 09:14:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:48,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664051170] [2020-10-29 09:14:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:49,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:49,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:14:49,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:49,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-29 09:14:49,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:49,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:49,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:14:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:49,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:49,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:49,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:49,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:49,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:49,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:14:49,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:49,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:49,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:49,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664051170] [2020-10-29 09:14:49,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:49,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:14:49,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017661073] [2020-10-29 09:14:49,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:14:49,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:49,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:14:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:14:49,369 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 6 states. [2020-10-29 09:14:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:49,688 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2020-10-29 09:14:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:14:49,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-29 09:14:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:49,691 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:14:49,691 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:14:49,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:14:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:14:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-10-29 09:14:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:14:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2020-10-29 09:14:49,703 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 22 [2020-10-29 09:14:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:49,703 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2020-10-29 09:14:49,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:14:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2020-10-29 09:14:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:14:49,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:49,705 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] [2020-10-29 09:14:49,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:14:49,705 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2051974996, now seen corresponding path program 1 times [2020-10-29 09:14:49,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:49,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399910067] [2020-10-29 09:14:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:49,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:49,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:50,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:50,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:14:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-29 09:14:50,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:50,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:14:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:50,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:50,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:50,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:50,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:50,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:14:50,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:50,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:50,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:50,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:50,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399910067] [2020-10-29 09:14:50,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:50,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:14:50,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245962973] [2020-10-29 09:14:50,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:14:50,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:14:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:14:50,202 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 7 states. [2020-10-29 09:14:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:50,620 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2020-10-29 09:14:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:14:50,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-29 09:14:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:50,625 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:14:50,625 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:14:50,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:14:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:14:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-29 09:14:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:14:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2020-10-29 09:14:50,643 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 24 [2020-10-29 09:14:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:50,645 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2020-10-29 09:14:50,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:14:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2020-10-29 09:14:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:14:50,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:50,650 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:50,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:14:50,650 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2050127954, now seen corresponding path program 1 times [2020-10-29 09:14:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:50,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300504632] [2020-10-29 09:14:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:50,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:50,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:50,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:50,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:51,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:51,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:14:51,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:14:51,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-29 09:14:51,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:51,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:51,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:51,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:14:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:51,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:51,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:51,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:51,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:14:51,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:51,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:51,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:51,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300504632] [2020-10-29 09:14:51,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:51,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:14:51,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229729526] [2020-10-29 09:14:51,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:14:51,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:51,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:14:51,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:14:51,492 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 7 states. [2020-10-29 09:14:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:51,779 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2020-10-29 09:14:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:14:51,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-29 09:14:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:51,781 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:14:51,781 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 09:14:51,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:14:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 09:14:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-29 09:14:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:14:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-10-29 09:14:51,794 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 24 [2020-10-29 09:14:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:51,794 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-10-29 09:14:51,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:14:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-10-29 09:14:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:14:51,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:51,796 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] [2020-10-29 09:14:51,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:14:51,796 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1849965290, now seen corresponding path program 1 times [2020-10-29 09:14:51,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:51,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487397094] [2020-10-29 09:14:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:51,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:52,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:52,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:14:52,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:14:52,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-29 09:14:52,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:52,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:14:52,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:52,467 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-10-29 09:14:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:52,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:52,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:52,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:52,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:52,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:14:52,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:52,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:52,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:52,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:52,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:52,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:52,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487397094] [2020-10-29 09:14:52,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:52,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:14:52,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640849583] [2020-10-29 09:14:52,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:14:52,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:52,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:14:52,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:14:52,592 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 8 states. [2020-10-29 09:14:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:53,051 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2020-10-29 09:14:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:14:53,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:14:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:53,053 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:14:53,053 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:14:53,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:14:53,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:14:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2020-10-29 09:14:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 09:14:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2020-10-29 09:14:53,066 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 24 [2020-10-29 09:14:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:53,066 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2020-10-29 09:14:53,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:14:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2020-10-29 09:14:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:14:53,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:53,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:53,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:14:53,068 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1369251541, now seen corresponding path program 2 times [2020-10-29 09:14:53,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:53,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035756084] [2020-10-29 09:14:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:53,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:53,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:14:53,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:53,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-29 09:14:53,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:53,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:53,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:53,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:53,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:14:53,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:53,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:53,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:53,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:53,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:53,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:53,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:14:53,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:53,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:53,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:53,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:53,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:53,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:53,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035756084] [2020-10-29 09:14:53,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:53,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:14:53,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85989761] [2020-10-29 09:14:53,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:14:53,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:53,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:14:53,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:14:53,556 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand 8 states. [2020-10-29 09:14:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:54,080 INFO L93 Difference]: Finished difference Result 120 states and 162 transitions. [2020-10-29 09:14:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:14:54,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:14:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:54,084 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:14:54,084 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:14:54,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:14:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:14:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-29 09:14:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:14:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2020-10-29 09:14:54,096 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 24 [2020-10-29 09:14:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:54,097 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2020-10-29 09:14:54,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:14:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2020-10-29 09:14:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:14:54,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:54,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:54,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:14:54,099 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1371098583, now seen corresponding path program 1 times [2020-10-29 09:14:54,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:54,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309786502] [2020-10-29 09:14:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:54,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:54,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:54,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:54,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:14:54,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:54,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-29 09:14:54,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:54,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:14:54,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:54,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:54,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:54,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:54,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:54,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:54,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:14:54,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:54,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:54,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:54,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309786502] [2020-10-29 09:14:54,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:54,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:14:54,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142479916] [2020-10-29 09:14:54,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:14:54,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:54,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:14:54,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:14:54,616 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand 8 states. [2020-10-29 09:14:55,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:55,156 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2020-10-29 09:14:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:14:55,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:14:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:55,158 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:14:55,159 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:14:55,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:14:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:14:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2020-10-29 09:14:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:14:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2020-10-29 09:14:55,174 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 24 [2020-10-29 09:14:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:55,174 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2020-10-29 09:14:55,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:14:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2020-10-29 09:14:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:14:55,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:55,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:55,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:14:55,176 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash -334303208, now seen corresponding path program 1 times [2020-10-29 09:14:55,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:55,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020313315] [2020-10-29 09:14:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:55,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:55,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:55,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:14:55,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:55,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-29 09:14:55,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:55,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:14:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:14:55,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:55,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:55,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:55,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:55,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:55,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:55,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:14:55,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:55,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:55,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:55,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:55,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:55,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:55,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020313315] [2020-10-29 09:14:55,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:55,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:14:55,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48244651] [2020-10-29 09:14:55,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:14:55,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:14:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:14:55,653 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand 9 states. [2020-10-29 09:14:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:56,139 INFO L93 Difference]: Finished difference Result 121 states and 163 transitions. [2020-10-29 09:14:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:14:56,140 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:14:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:56,141 INFO L225 Difference]: With dead ends: 121 [2020-10-29 09:14:56,141 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:14:56,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:14:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:14:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2020-10-29 09:14:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:14:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2020-10-29 09:14:56,153 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 26 [2020-10-29 09:14:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:56,153 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2020-10-29 09:14:56,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:14:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2020-10-29 09:14:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:14:56,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:56,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:56,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:14:56,156 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash -332456166, now seen corresponding path program 1 times [2020-10-29 09:14:56,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:56,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381865449] [2020-10-29 09:14:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:56,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:56,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:56,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:14:56,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:56,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-29 09:14:56,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:56,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:56,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:14:56,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:56,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:14:56,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:14:56,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:56,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:56,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:56,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:56,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:56,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:14:56,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:56,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:56,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:56,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 09:14:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:56,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381865449] [2020-10-29 09:14:56,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:56,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:14:56,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385223827] [2020-10-29 09:14:56,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:14:56,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:56,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:14:56,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:14:56,797 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand 9 states. [2020-10-29 09:14:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:57,331 INFO L93 Difference]: Finished difference Result 144 states and 198 transitions. [2020-10-29 09:14:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:14:57,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:14:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:57,334 INFO L225 Difference]: With dead ends: 144 [2020-10-29 09:14:57,334 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:14:57,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:14:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:14:57,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2020-10-29 09:14:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-29 09:14:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2020-10-29 09:14:57,364 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 26 [2020-10-29 09:14:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:57,364 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2020-10-29 09:14:57,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:14:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2020-10-29 09:14:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:14:57,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:57,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:57,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:14:57,366 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1143649834, now seen corresponding path program 1 times [2020-10-29 09:14:57,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:57,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129584312] [2020-10-29 09:14:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:57,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:57,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:57,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:57,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:14:57,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:57,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-29 09:14:57,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:57,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:57,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:14:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:58,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:58,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:58,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:58,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:58,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:14:58,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:58,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:58,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:58,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129584312] [2020-10-29 09:14:58,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:58,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:14:58,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992542600] [2020-10-29 09:14:58,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:14:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:14:58,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:14:58,095 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand 7 states. [2020-10-29 09:14:58,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:58,437 INFO L93 Difference]: Finished difference Result 138 states and 189 transitions. [2020-10-29 09:14:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:14:58,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-29 09:14:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:58,439 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:14:58,439 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:14:58,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:14:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:14:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-29 09:14:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:14:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 132 transitions. [2020-10-29 09:14:58,450 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 132 transitions. Word has length 26 [2020-10-29 09:14:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:58,450 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 132 transitions. [2020-10-29 09:14:58,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:14:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 132 transitions. [2020-10-29 09:14:58,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:14:58,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:58,452 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:58,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:14:58,452 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:58,452 INFO L82 PathProgramCache]: Analyzing trace with hash 211082868, now seen corresponding path program 1 times [2020-10-29 09:14:58,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:58,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393615929] [2020-10-29 09:14:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:58,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:58,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:58,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:58,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:58,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:00,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:00,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:15:00,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:15:00,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-29 09:15:00,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:00,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:00,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:15:00,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:00,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:15:00,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:00,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:00,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:00,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:00,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:00,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:00,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:00,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:00,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:00,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:00,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:00,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393615929] [2020-10-29 09:15:00,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:00,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:15:00,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376594861] [2020-10-29 09:15:00,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:15:00,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:15:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:15:00,310 INFO L87 Difference]: Start difference. First operand 97 states and 132 transitions. Second operand 8 states. [2020-10-29 09:15:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:00,761 INFO L93 Difference]: Finished difference Result 149 states and 205 transitions. [2020-10-29 09:15:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:15:00,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-29 09:15:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:00,764 INFO L225 Difference]: With dead ends: 149 [2020-10-29 09:15:00,764 INFO L226 Difference]: Without dead ends: 128 [2020-10-29 09:15:00,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:15:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-29 09:15:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-10-29 09:15:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-29 09:15:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 152 transitions. [2020-10-29 09:15:00,787 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 152 transitions. Word has length 28 [2020-10-29 09:15:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:00,788 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 152 transitions. [2020-10-29 09:15:00,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:15:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 152 transitions. [2020-10-29 09:15:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:15:00,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:00,790 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 09:15:00,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:15:00,790 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash -564155042, now seen corresponding path program 2 times [2020-10-29 09:15:00,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:00,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971056511] [2020-10-29 09:15:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:00,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:01,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:01,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:15:01,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:01,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-29 09:15:01,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:01,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:15:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:15:01,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:01,325 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-29 09:15:01,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:01,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:01,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:01,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:01,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:01,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:15:01,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:01,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:01,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:01,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:01,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:01,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:15:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:01,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971056511] [2020-10-29 09:15:01,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:01,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:15:01,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540929617] [2020-10-29 09:15:01,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:15:01,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:01,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:15:01,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:15:01,541 INFO L87 Difference]: Start difference. First operand 111 states and 152 transitions. Second operand 10 states. [2020-10-29 09:15:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:02,278 INFO L93 Difference]: Finished difference Result 138 states and 186 transitions. [2020-10-29 09:15:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:15:02,279 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:15:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:02,281 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:15:02,281 INFO L226 Difference]: Without dead ends: 134 [2020-10-29 09:15:02,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:15:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-29 09:15:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2020-10-29 09:15:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-29 09:15:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 157 transitions. [2020-10-29 09:15:02,295 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 157 transitions. Word has length 30 [2020-10-29 09:15:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:02,296 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 157 transitions. [2020-10-29 09:15:02,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:15:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 157 transitions. [2020-10-29 09:15:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:15:02,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:02,300 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, 1, 1, 1] [2020-10-29 09:15:02,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:15:02,300 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash -562308000, now seen corresponding path program 2 times [2020-10-29 09:15:02,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:02,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305630534] [2020-10-29 09:15:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:02,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:02,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:02,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:02,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:15:02,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:02,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-29 09:15:02,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:02,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:02,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:15:02,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:02,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:15:02,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:02,989 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-29 09:15:03,121 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-10-29 09:15:03,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:03,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:03,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:03,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:03,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:15:03,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:03,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:03,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:03,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:03,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:03,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:03,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305630534] [2020-10-29 09:15:03,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:03,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:15:03,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784539355] [2020-10-29 09:15:03,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:15:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:15:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:15:03,359 INFO L87 Difference]: Start difference. First operand 115 states and 157 transitions. Second operand 10 states. [2020-10-29 09:15:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:04,890 INFO L93 Difference]: Finished difference Result 158 states and 218 transitions. [2020-10-29 09:15:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:15:04,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:15:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:04,892 INFO L225 Difference]: With dead ends: 158 [2020-10-29 09:15:04,892 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 09:15:04,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:15:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 09:15:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2020-10-29 09:15:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-29 09:15:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 164 transitions. [2020-10-29 09:15:04,906 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 164 transitions. Word has length 30 [2020-10-29 09:15:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:04,906 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 164 transitions. [2020-10-29 09:15:04,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:15:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 164 transitions. [2020-10-29 09:15:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:15:04,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:04,907 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 09:15:04,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:15:04,907 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1373501668, now seen corresponding path program 2 times [2020-10-29 09:15:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:04,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650179297] [2020-10-29 09:15:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:04,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:05,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:05,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:05,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:15:05,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:05,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-29 09:15:05,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:05,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:05,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:15:05,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:05,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:15:05,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:05,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:05,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:05,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:05,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:05,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:05,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:05,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:05,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:05,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:05,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:05,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:05,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:05,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650179297] [2020-10-29 09:15:05,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:05,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:15:05,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949104441] [2020-10-29 09:15:05,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:15:05,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:05,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:15:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:15:05,729 INFO L87 Difference]: Start difference. First operand 120 states and 164 transitions. Second operand 8 states. [2020-10-29 09:15:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:06,113 INFO L93 Difference]: Finished difference Result 137 states and 185 transitions. [2020-10-29 09:15:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:15:06,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-29 09:15:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:06,115 INFO L225 Difference]: With dead ends: 137 [2020-10-29 09:15:06,115 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:15:06,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:15:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:15:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2020-10-29 09:15:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-29 09:15:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 161 transitions. [2020-10-29 09:15:06,127 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 161 transitions. Word has length 30 [2020-10-29 09:15:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:06,127 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 161 transitions. [2020-10-29 09:15:06,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:15:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 161 transitions. [2020-10-29 09:15:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:15:06,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:06,128 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:06,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:15:06,128 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1089197329, now seen corresponding path program 2 times [2020-10-29 09:15:06,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:06,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912858212] [2020-10-29 09:15:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:06,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:06,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:06,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:06,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:06,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:07,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:07,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:15:07,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:15:07,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-29 09:15:07,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:07,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:07,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:15:07,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:07,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:15:07,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:07,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:07,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:07,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:07,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:07,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:15:07,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:07,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:07,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:15:07,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912858212] [2020-10-29 09:15:07,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:07,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:15:07,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534675875] [2020-10-29 09:15:07,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:15:07,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:15:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:15:07,281 INFO L87 Difference]: Start difference. First operand 119 states and 161 transitions. Second operand 8 states. [2020-10-29 09:15:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:07,644 INFO L93 Difference]: Finished difference Result 164 states and 220 transitions. [2020-10-29 09:15:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:15:07,652 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-29 09:15:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:07,653 INFO L225 Difference]: With dead ends: 164 [2020-10-29 09:15:07,654 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:15:07,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:15:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:15:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2020-10-29 09:15:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-29 09:15:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2020-10-29 09:15:07,669 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 32 [2020-10-29 09:15:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:07,670 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2020-10-29 09:15:07,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:15:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2020-10-29 09:15:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:15:07,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:07,672 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:07,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:15:07,672 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash 694323277, now seen corresponding path program 1 times [2020-10-29 09:15:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864382558] [2020-10-29 09:15:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:07,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:07,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:07,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:08,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:08,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:15:08,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:15:08,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-29 09:15:08,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:08,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:15:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:08,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:15:08,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:08,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:08,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:08,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:08,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:08,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:15:08,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:08,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:08,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:15:08,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864382558] [2020-10-29 09:15:08,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:08,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:15:08,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981956915] [2020-10-29 09:15:08,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:15:08,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:08,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:15:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:15:08,431 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand 7 states. [2020-10-29 09:15:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:08,689 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2020-10-29 09:15:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:15:08,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-29 09:15:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:08,693 INFO L225 Difference]: With dead ends: 157 [2020-10-29 09:15:08,693 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:15:08,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:15:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:15:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-29 09:15:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:15:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2020-10-29 09:15:08,707 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 32 [2020-10-29 09:15:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:08,707 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2020-10-29 09:15:08,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:15:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2020-10-29 09:15:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:15:08,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:08,708 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:08,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:15:08,708 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash -608812959, now seen corresponding path program 3 times [2020-10-29 09:15:08,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:08,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540214086] [2020-10-29 09:15:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:08,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:08,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:08,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:15:08,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:08,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-29 09:15:08,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:08,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:08,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:15:08,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:08,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:15:08,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:09,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:09,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:09,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:09,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:09,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:09,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:09,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:09,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:09,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:09,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:09,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:09,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:09,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540214086] [2020-10-29 09:15:09,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:09,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:15:09,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618008196] [2020-10-29 09:15:09,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:15:09,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:15:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:15:09,414 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand 9 states. [2020-10-29 09:15:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:10,288 INFO L93 Difference]: Finished difference Result 216 states and 301 transitions. [2020-10-29 09:15:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:15:10,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-29 09:15:10,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:10,291 INFO L225 Difference]: With dead ends: 216 [2020-10-29 09:15:10,291 INFO L226 Difference]: Without dead ends: 186 [2020-10-29 09:15:10,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:15:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-29 09:15:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 175. [2020-10-29 09:15:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-29 09:15:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 243 transitions. [2020-10-29 09:15:10,314 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 243 transitions. Word has length 32 [2020-10-29 09:15:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:10,314 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 243 transitions. [2020-10-29 09:15:10,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:15:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 243 transitions. [2020-10-29 09:15:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:15:10,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:10,315 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, 1, 1] [2020-10-29 09:15:10,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:15:10,315 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1633197510, now seen corresponding path program 2 times [2020-10-29 09:15:10,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:10,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968911096] [2020-10-29 09:15:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:10,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:10,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:10,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:10,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:12,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:12,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:15:12,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:15:12,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1800 [2020-10-29 09:15:12,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:12,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:15:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:15:12,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:15:12,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:12,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:12,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:12,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:12,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:15:12,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:12,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:12,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:12,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968911096] [2020-10-29 09:15:12,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:12,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:15:12,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026287078] [2020-10-29 09:15:12,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:15:12,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:12,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:15:12,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:15:12,414 INFO L87 Difference]: Start difference. First operand 175 states and 243 transitions. Second operand 8 states. [2020-10-29 09:15:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:12,862 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2020-10-29 09:15:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:15:12,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-29 09:15:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:12,864 INFO L225 Difference]: With dead ends: 225 [2020-10-29 09:15:12,864 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 09:15:12,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:15:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 09:15:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-10-29 09:15:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-29 09:15:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 173 transitions. [2020-10-29 09:15:12,876 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 173 transitions. Word has length 32 [2020-10-29 09:15:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:12,876 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 173 transitions. [2020-10-29 09:15:12,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:15:12,876 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 173 transitions. [2020-10-29 09:15:12,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:15:12,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:12,879 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:12,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:15:12,879 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1599782787, now seen corresponding path program 3 times [2020-10-29 09:15:12,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:12,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008143554] [2020-10-29 09:15:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:12,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:12,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:13,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:13,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:15,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:15,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:15:15,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:15:15,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2334 [2020-10-29 09:15:15,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:15,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:15:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:15:15,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:15,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:15,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:15,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:15,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:15,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:15,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:15,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:15,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:15,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:15,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008143554] [2020-10-29 09:15:15,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:15,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:15:15,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942361627] [2020-10-29 09:15:15,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:15:15,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:15,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:15:15,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:15:15,526 INFO L87 Difference]: Start difference. First operand 132 states and 173 transitions. Second operand 9 states. [2020-10-29 09:15:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:16,080 INFO L93 Difference]: Finished difference Result 188 states and 251 transitions. [2020-10-29 09:15:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:15:16,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-29 09:15:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:16,083 INFO L225 Difference]: With dead ends: 188 [2020-10-29 09:15:16,083 INFO L226 Difference]: Without dead ends: 167 [2020-10-29 09:15:16,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:15:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-29 09:15:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 147. [2020-10-29 09:15:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-29 09:15:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2020-10-29 09:15:16,096 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 34 [2020-10-29 09:15:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:16,097 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2020-10-29 09:15:16,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:15:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2020-10-29 09:15:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:15:16,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:16,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:16,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:15:16,098 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:16,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1994656839, now seen corresponding path program 1 times [2020-10-29 09:15:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:16,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329500090] [2020-10-29 09:15:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:16,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:17,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:19,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:19,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:15:19,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:15:19,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3088 [2020-10-29 09:15:19,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:19,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:15:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:15:19,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:19,567 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-29 09:15:19,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:19,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:19,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:19,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:19,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:19,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:15:19,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:19,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:19,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:19,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:15:19,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329500090] [2020-10-29 09:15:19,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:19,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:15:19,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445850804] [2020-10-29 09:15:19,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:15:19,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:19,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:15:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:15:19,707 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand 9 states. [2020-10-29 09:15:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:20,562 INFO L93 Difference]: Finished difference Result 202 states and 271 transitions. [2020-10-29 09:15:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:15:20,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-29 09:15:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:20,565 INFO L225 Difference]: With dead ends: 202 [2020-10-29 09:15:20,566 INFO L226 Difference]: Without dead ends: 198 [2020-10-29 09:15:20,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:15:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-29 09:15:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 137. [2020-10-29 09:15:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:15:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 182 transitions. [2020-10-29 09:15:20,578 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 182 transitions. Word has length 34 [2020-10-29 09:15:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:20,578 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 182 transitions. [2020-10-29 09:15:20,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:15:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 182 transitions. [2020-10-29 09:15:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:15:20,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:20,579 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, 1, 1] [2020-10-29 09:15:20,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:15:20,579 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash 903894948, now seen corresponding path program 4 times [2020-10-29 09:15:20,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:20,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950222438] [2020-10-29 09:15:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:20,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:20,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:15:20,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:20,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-29 09:15:20,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:20,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:20,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:15:20,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:20,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:15:20,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:21,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:21,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:21,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:21,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:21,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:21,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:21,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:21,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:21,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:21,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:21,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:21,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:21,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950222438] [2020-10-29 09:15:21,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:21,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:15:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724554441] [2020-10-29 09:15:21,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:15:21,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:15:21,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:15:21,504 INFO L87 Difference]: Start difference. First operand 137 states and 182 transitions. Second operand 11 states. [2020-10-29 09:15:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:22,590 INFO L93 Difference]: Finished difference Result 156 states and 205 transitions. [2020-10-29 09:15:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:15:22,592 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-29 09:15:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:22,593 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:15:22,594 INFO L226 Difference]: Without dead ends: 152 [2020-10-29 09:15:22,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:15:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-29 09:15:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2020-10-29 09:15:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-29 09:15:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 185 transitions. [2020-10-29 09:15:22,605 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 185 transitions. Word has length 34 [2020-10-29 09:15:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:22,605 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 185 transitions. [2020-10-29 09:15:22,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:15:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 185 transitions. [2020-10-29 09:15:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:15:22,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:22,606 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:22,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:15:22,606 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:22,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:22,607 INFO L82 PathProgramCache]: Analyzing trace with hash 905741990, now seen corresponding path program 3 times [2020-10-29 09:15:22,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:22,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990511863] [2020-10-29 09:15:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:22,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:22,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:23,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:23,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:15:23,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:23,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-29 09:15:23,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:23,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:15:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:15:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:23,282 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 10: A-local: [(main_~p~0.base_13 Int)], B-local: []. [2020-10-29 09:15:23,287 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 11: A-local: [(main_~p~0.base_13 Int)], B-local: []. [2020-10-29 09:15:23,290 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 12: A-local: [(main_~p~0.base_13 Int)], B-local: []. [2020-10-29 09:15:23,293 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 13: A-local: [(main_~p~0.base_13 Int)], B-local: []. [2020-10-29 09:15:23,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:15:23,318 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-29 09:15:23,323 INFO L168 Benchmark]: Toolchain (without parser) took 38181.03 ms. Allocated memory was 152.0 MB in the beginning and 338.7 MB in the end (delta: 186.6 MB). Free memory was 125.9 MB in the beginning and 222.9 MB in the end (delta: -97.0 MB). Peak memory consumption was 198.7 MB. Max. memory is 8.0 GB. [2020-10-29 09:15:23,324 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:15:23,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.24 ms. Allocated memory is still 152.0 MB. Free memory was 125.3 MB in the beginning and 103.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:15:23,325 INFO L168 Benchmark]: Boogie Preprocessor took 89.46 ms. Allocated memory is still 152.0 MB. Free memory was 103.4 MB in the beginning and 134.3 MB in the end (delta: -30.9 MB). Peak memory consumption was 6.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:15:23,325 INFO L168 Benchmark]: RCFGBuilder took 862.59 ms. Allocated memory is still 152.0 MB. Free memory was 134.3 MB in the beginning and 95.3 MB in the end (delta: 39.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2020-10-29 09:15:23,326 INFO L168 Benchmark]: TraceAbstraction took 36572.48 ms. Allocated memory was 152.0 MB in the beginning and 338.7 MB in the end (delta: 186.6 MB). Free memory was 94.7 MB in the beginning and 222.9 MB in the end (delta: -128.2 MB). Peak memory consumption was 166.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:15:23,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 645.24 ms. Allocated memory is still 152.0 MB. Free memory was 125.3 MB in the beginning and 103.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 89.46 ms. Allocated memory is still 152.0 MB. Free memory was 103.4 MB in the beginning and 134.3 MB in the end (delta: -30.9 MB). Peak memory consumption was 6.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 862.59 ms. Allocated memory is still 152.0 MB. Free memory was 134.3 MB in the beginning and 95.3 MB in the end (delta: 39.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 36572.48 ms. Allocated memory was 152.0 MB in the beginning and 338.7 MB in the end (delta: 186.6 MB). Free memory was 94.7 MB in the beginning and 222.9 MB in the end (delta: -128.2 MB). Peak memory consumption was 166.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...