/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:40:26,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:40:26,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:40:26,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:40:26,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:40:26,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:40:26,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:40:26,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:40:26,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:40:26,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:40:26,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:40:26,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:40:26,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:40:26,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:40:26,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:40:26,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:40:26,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:40:26,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:40:26,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:40:26,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:40:26,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:40:26,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:40:26,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:40:26,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:40:26,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:40:26,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:40:26,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:40:26,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:40:26,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:40:26,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:40:26,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:40:26,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:40:26,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:40:26,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:40:26,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:40:26,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:40:26,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:40:26,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:40:26,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:40:26,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:40:26,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:40:26,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:40:26,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:40:26,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:40:26,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:40:26,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:40:26,507 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:40:26,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:40:26,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:40:26,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:40:26,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:40:26,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:40:26,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:40:26,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:40:26,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:40:26,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:40:26,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:40:26,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:40:26,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:40:26,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:40:26,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:40:26,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:40:26,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:40:26,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:40:26,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:40:26,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:40:26,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:40:26,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:40:26,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:40:26,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:40:26,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:40:26,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:40:26,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:40:27,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:40:27,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:40:27,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:40:27,012 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:40:27,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-28 14:40:27,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74c1df8e5/c4f7c2712f34417081d0340f0a05f018/FLAGefa2a1170 [2020-10-28 14:40:27,837 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:40:27,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-28 14:40:27,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74c1df8e5/c4f7c2712f34417081d0340f0a05f018/FLAGefa2a1170 [2020-10-28 14:40:28,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74c1df8e5/c4f7c2712f34417081d0340f0a05f018 [2020-10-28 14:40:28,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:40:28,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:40:28,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:40:28,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:40:28,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:40:28,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a20ebfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28, skipping insertion in model container [2020-10-28 14:40:28,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:40:28,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:40:28,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:40:28,501 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:40:28,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:40:28,741 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:40:28,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28 WrapperNode [2020-10-28 14:40:28,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:40:28,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:40:28,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:40:28,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:40:28,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (1/1) ... [2020-10-28 14:40:28,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:40:28,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:40:28,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:40:28,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:40:28,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:40:28,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:40:28,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:40:28,967 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:40:28,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:40:28,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:40:28,967 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:40:28,967 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-10-28 14:40:28,967 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-10-28 14:40:28,968 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-10-28 14:40:28,968 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-10-28 14:40:28,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:40:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:40:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:40:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:40:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:40:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:40:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:40:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:40:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:40:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:40:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:40:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:40:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:40:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:40:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:40:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:40:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:40:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:40:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:40:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:40:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:40:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:40:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:40:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:40:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:40:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:40:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:40:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:40:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:40:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:40:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:40:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:40:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:40:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:40:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:40:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:40:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:40:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:40:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:40:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:40:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:40:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:40:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:40:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:40:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:40:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:40:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:40:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:40:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:40:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:40:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:40:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:40:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:40:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:40:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:40:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:40:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:40:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:40:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:40:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:40:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:40:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:40:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:40:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:40:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:40:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:40:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:40:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:40:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:40:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:40:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:40:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:40:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:40:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:40:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:40:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:40:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:40:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:40:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:40:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:40:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:40:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:40:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:40:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:40:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:40:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:40:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:40:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:40:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:40:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:40:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:40:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:40:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:40:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:40:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:40:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:40:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:40:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:40:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:40:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:40:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:40:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:40:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:40:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:40:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:40:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:40:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:40:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:40:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:40:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:40:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:40:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:40:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:40:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-10-28 14:40:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:40:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-10-28 14:40:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:40:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:40:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-10-28 14:40:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-10-28 14:40:28,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:40:28,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:40:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:40:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:40:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:40:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:40:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:40:29,441 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:40:29,854 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:40:29,854 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 14:40:29,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:40:29 BoogieIcfgContainer [2020-10-28 14:40:29,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:40:29,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:40:29,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:40:29,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:40:29,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:40:28" (1/3) ... [2020-10-28 14:40:29,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be77d36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:40:29, skipping insertion in model container [2020-10-28 14:40:29,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:28" (2/3) ... [2020-10-28 14:40:29,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be77d36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:40:29, skipping insertion in model container [2020-10-28 14:40:29,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:40:29" (3/3) ... [2020-10-28 14:40:29,866 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2020-10-28 14:40:29,878 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:40:29,884 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:40:29,898 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:40:29,930 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:40:29,930 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:40:29,930 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:40:29,930 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:40:29,930 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:40:29,930 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:40:29,930 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:40:29,931 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:40:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-28 14:40:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:40:29,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:29,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:29,957 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:29,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1562599215, now seen corresponding path program 1 times [2020-10-28 14:40:29,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:29,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765945145] [2020-10-28 14:40:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:30,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:30,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:30,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:40:30,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:30,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-28 14:40:30,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:30,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:40:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:30,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:40:30,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:30,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:30,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:30,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:30,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:30,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 14:40:30,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:30,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:30,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:30,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765945145] [2020-10-28 14:40:30,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:30,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:40:30,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674147921] [2020-10-28 14:40:30,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:40:30,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:40:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:40:30,683 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-10-28 14:40:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:30,893 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-10-28 14:40:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:40:30,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 14:40:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:30,904 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:40:30,904 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 14:40:30,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:40:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 14:40:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 14:40:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:40:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 14:40:30,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-28 14:40:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:30,949 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 14:40:30,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:40:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 14:40:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:40:30,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:30,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:30,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:40:30,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:30,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1021400540, now seen corresponding path program 1 times [2020-10-28 14:40:30,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:30,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446273028] [2020-10-28 14:40:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:30,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:31,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:40:31,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:31,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 14:40:31,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:31,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:40:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:40:31,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:31,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:31,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:31,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:31,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:31,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:40:31,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:31,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:31,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:31,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446273028] [2020-10-28 14:40:31,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:31,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:40:31,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058116966] [2020-10-28 14:40:31,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:40:31,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:40:31,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:40:31,166 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-28 14:40:31,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:31,314 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-28 14:40:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:40:31,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:40:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:31,317 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:40:31,317 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:40:31,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:40:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:40:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-10-28 14:40:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:40:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 14:40:31,326 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-28 14:40:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:31,327 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 14:40:31,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:40:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 14:40:31,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:40:31,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:31,328 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:31,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:40:31,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:31,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1745502243, now seen corresponding path program 1 times [2020-10-28 14:40:31,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:31,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049024170] [2020-10-28 14:40:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:31,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:40:31,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:31,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 14:40:31,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:31,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:31,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:40:31,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:31,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:40:31,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:31,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:31,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:31,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:31,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:40:31,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:31,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:31,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:31,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:31,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049024170] [2020-10-28 14:40:31,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:31,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:40:31,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407569199] [2020-10-28 14:40:31,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:40:31,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:40:31,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:40:31,599 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-28 14:40:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:31,727 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-28 14:40:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:40:31,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 14:40:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:31,729 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:40:31,729 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:40:31,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:40:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:40:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-10-28 14:40:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:40:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 14:40:31,742 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-28 14:40:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:31,743 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 14:40:31,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:40:31,743 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 14:40:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:40:31,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:31,744 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:31,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:40:31,745 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash -727649085, now seen corresponding path program 1 times [2020-10-28 14:40:31,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:31,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24769948] [2020-10-28 14:40:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:31,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:31,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:40:31,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:31,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-28 14:40:31,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:31,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:31,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:40:31,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:31,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:40:31,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:32,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:32,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:32,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:32,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:40:32,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:32,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:32,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:32,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:32,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:32,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:32,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24769948] [2020-10-28 14:40:32,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:32,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:40:32,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206482723] [2020-10-28 14:40:32,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:40:32,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:40:32,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:40:32,246 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-28 14:40:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:32,495 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-28 14:40:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:40:32,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-28 14:40:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:32,497 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:40:32,497 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 14:40:32,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 14:40:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-28 14:40:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:40:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 14:40:32,505 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2020-10-28 14:40:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:32,505 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 14:40:32,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:40:32,506 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 14:40:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:40:32,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:32,507 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] [2020-10-28 14:40:32,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:40:32,507 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:32,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1943608356, now seen corresponding path program 1 times [2020-10-28 14:40:32,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:32,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142939693] [2020-10-28 14:40:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:32,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:32,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:40:32,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:32,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-28 14:40:32,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:32,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:32,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:40:32,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:32,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:40:32,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:32,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:32,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:32,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:32,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:32,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:32,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:32,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:32,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:32,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:32,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:32,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142939693] [2020-10-28 14:40:32,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:32,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:40:32,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278006594] [2020-10-28 14:40:32,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:40:32,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:40:32,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:32,938 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-28 14:40:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:33,259 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-28 14:40:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:40:33,260 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-28 14:40:33,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:33,262 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:40:33,263 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:40:33,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:40:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:40:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-28 14:40:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:40:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 14:40:33,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-28 14:40:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:33,273 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 14:40:33,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:40:33,273 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 14:40:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:40:33,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:33,278 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:33,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:40:33,278 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:33,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:33,279 INFO L82 PathProgramCache]: Analyzing trace with hash 874039338, now seen corresponding path program 2 times [2020-10-28 14:40:33,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:33,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328435890] [2020-10-28 14:40:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:33,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:33,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:33,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:40:33,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:33,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-28 14:40:33,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:33,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:40:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:33,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:40:33,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:33,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:33,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:33,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:33,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:33,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:33,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:40:33,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:33,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:33,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:33,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:33,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:33,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328435890] [2020-10-28 14:40:33,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:33,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:40:33,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148067510] [2020-10-28 14:40:33,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:40:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:40:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:40:33,763 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-28 14:40:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:34,146 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-28 14:40:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:40:34,147 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-28 14:40:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:34,149 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:40:34,149 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:40:34,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:40:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:40:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2020-10-28 14:40:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:40:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-28 14:40:34,157 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 24 [2020-10-28 14:40:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:34,157 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-28 14:40:34,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:40:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-28 14:40:34,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:40:34,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:34,158 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:34,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:40:34,159 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:34,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1462891043, now seen corresponding path program 2 times [2020-10-28 14:40:34,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:34,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304584811] [2020-10-28 14:40:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:34,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:34,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:40:34,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:34,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 14:40:34,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:34,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:34,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:40:34,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:34,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:40:34,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:34,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:34,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:34,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:34,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:34,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:34,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:40:34,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:34,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:34,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:34,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304584811] [2020-10-28 14:40:34,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:34,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:40:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075031871] [2020-10-28 14:40:34,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:40:34,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:34,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:40:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:34,534 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-10-28 14:40:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:34,779 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-28 14:40:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:40:34,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:40:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:34,781 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:40:34,781 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:40:34,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:40:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-28 14:40:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:40:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-28 14:40:34,789 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-28 14:40:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:34,789 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-28 14:40:34,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:40:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-28 14:40:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:40:34,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:34,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:34,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:40:34,791 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1164509973, now seen corresponding path program 3 times [2020-10-28 14:40:34,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:34,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955128729] [2020-10-28 14:40:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:34,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:35,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:35,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:40:35,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:35,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-28 14:40:35,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:35,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:35,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:40:35,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:40:35,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:35,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:35,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:35,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:35,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:35,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:35,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:35,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:35,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:35,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:35,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955128729] [2020-10-28 14:40:35,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:35,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:40:35,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247773949] [2020-10-28 14:40:35,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:40:35,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:35,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:40:35,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:40:35,433 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-28 14:40:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:35,792 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-28 14:40:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:40:35,793 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-28 14:40:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:35,794 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:40:35,794 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:40:35,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:40:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:40:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-10-28 14:40:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:40:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-28 14:40:35,808 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-28 14:40:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:35,808 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-28 14:40:35,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:40:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-28 14:40:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:40:35,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:35,810 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:35,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:40:35,812 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1558540271, now seen corresponding path program 3 times [2020-10-28 14:40:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:35,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653112538] [2020-10-28 14:40:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:35,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:36,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:40:36,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:36,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-28 14:40:36,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:36,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:36,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:40:36,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:40:36,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:36,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:36,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:36,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:36,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:40:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:36,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:40:36,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653112538] [2020-10-28 14:40:36,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:36,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:40:36,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317230002] [2020-10-28 14:40:36,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:40:36,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:36,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:40:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:40:36,329 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2020-10-28 14:40:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:36,469 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-28 14:40:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:40:36,469 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-28 14:40:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:36,470 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:40:36,470 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:40:36,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:40:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:40:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-28 14:40:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:40:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-28 14:40:36,481 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-10-28 14:40:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:36,484 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-28 14:40:36,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:40:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-28 14:40:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:40:36,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:36,486 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:36,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:40:36,487 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash 216095818, now seen corresponding path program 4 times [2020-10-28 14:40:36,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:36,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051057432] [2020-10-28 14:40:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:36,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:36,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:40:36,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:36,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-28 14:40:36,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:36,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:36,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:40:36,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:36,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:40:36,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:37,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:37,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:37,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:37,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:37,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 14:40:37,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:37,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:37,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:37,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051057432] [2020-10-28 14:40:37,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:37,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:40:37,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666175127] [2020-10-28 14:40:37,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:40:37,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:37,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:40:37,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:40:37,382 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-10-28 14:40:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:37,911 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-28 14:40:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:40:37,912 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-28 14:40:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:37,913 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:40:37,913 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:40:37,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:40:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:40:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-28 14:40:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:40:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-28 14:40:37,921 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2020-10-28 14:40:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:37,921 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-28 14:40:37,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:40:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-28 14:40:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:40:37,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:37,922 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:37,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:40:37,923 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1168563662, now seen corresponding path program 5 times [2020-10-28 14:40:37,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:37,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270447775] [2020-10-28 14:40:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:37,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:38,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:38,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:40:38,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:38,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-28 14:40:38,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:38,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:40:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:38,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:40:38,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:38,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:38,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:38,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:38,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:38,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:38,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:38,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:38,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:38,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270447775] [2020-10-28 14:40:38,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:38,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:40:38,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037145829] [2020-10-28 14:40:38,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:40:38,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:38,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:40:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:40:38,844 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-28 14:40:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:39,545 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-28 14:40:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:40:39,546 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-28 14:40:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:39,547 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:40:39,547 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:40:39,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:40:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:40:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-28 14:40:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:40:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-28 14:40:39,566 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 31 [2020-10-28 14:40:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:39,566 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-28 14:40:39,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:40:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-28 14:40:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:40:39,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:39,567 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:39,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:40:39,568 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:39,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1695122699, now seen corresponding path program 6 times [2020-10-28 14:40:39,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:39,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884864394] [2020-10-28 14:40:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:39,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:39,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:39,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:40:39,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-28 14:40:39,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:39,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:40:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:40:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:40,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:40,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:40,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:40,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:40,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:40,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:40,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:40,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:40,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:40,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:40,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:40,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884864394] [2020-10-28 14:40:40,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:40,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:40:40,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965692963] [2020-10-28 14:40:40,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:40:40,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:40,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:40:40,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:40:40,136 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 13 states. [2020-10-28 14:40:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:40,633 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-28 14:40:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:40:40,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-28 14:40:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:40,635 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:40:40,635 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:40:40,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:40:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:40:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-28 14:40:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:40:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-28 14:40:40,643 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-10-28 14:40:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:40,643 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-28 14:40:40,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:40:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-28 14:40:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:40:40,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:40,644 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:40,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:40:40,645 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash 720460529, now seen corresponding path program 7 times [2020-10-28 14:40:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:40,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355874926] [2020-10-28 14:40:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:40,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:41,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:41,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:40:41,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:41,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-28 14:40:41,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:41,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:40:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:40:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:41,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:41,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:41,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:41,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:41,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:41,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:40:41,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:41,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:41,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:41,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355874926] [2020-10-28 14:40:41,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:41,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:40:41,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707360680] [2020-10-28 14:40:41,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:40:41,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:40:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:41,561 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 15 states. [2020-10-28 14:40:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:42,538 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-28 14:40:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:40:42,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-28 14:40:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:42,539 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:40:42,539 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:40:42,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:40:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:40:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-28 14:40:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:40:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-28 14:40:42,550 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 34 [2020-10-28 14:40:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:42,550 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-28 14:40:42,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:40:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-28 14:40:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:40:42,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:42,551 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:42,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:40:42,552 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:42,552 INFO L82 PathProgramCache]: Analyzing trace with hash -375999481, now seen corresponding path program 8 times [2020-10-28 14:40:42,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:42,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638847259] [2020-10-28 14:40:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:42,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:43,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:43,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:40:43,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:43,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-28 14:40:43,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:43,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:43,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:40:43,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:43,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:40:43,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:43,643 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-28 14:40:44,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:44,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:44,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:44,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:44,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:44,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:44,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:44,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:44,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:44,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:44,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:44,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:44,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638847259] [2020-10-28 14:40:44,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:44,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:40:44,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790821159] [2020-10-28 14:40:44,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:40:44,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:40:44,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:40:44,139 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-28 14:40:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:45,305 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-28 14:40:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:40:45,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-28 14:40:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:45,306 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:40:45,306 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:40:45,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:40:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:40:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-28 14:40:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:40:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-28 14:40:45,324 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 35 [2020-10-28 14:40:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:45,324 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-28 14:40:45,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:40:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-28 14:40:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:40:45,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:45,325 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:45,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:40:45,326 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:45,327 INFO L82 PathProgramCache]: Analyzing trace with hash 38381294, now seen corresponding path program 9 times [2020-10-28 14:40:45,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:45,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572836163] [2020-10-28 14:40:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:45,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:45,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:45,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:40:45,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:45,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-28 14:40:45,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:45,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:40:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:40:45,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:46,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:46,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:46,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:46,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:46,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:46,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:46,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:46,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:46,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:46,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572836163] [2020-10-28 14:40:46,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:46,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:40:46,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987943696] [2020-10-28 14:40:46,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:40:46,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:46,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:40:46,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:40:46,330 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 16 states. [2020-10-28 14:40:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:47,310 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-28 14:40:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:40:47,311 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-28 14:40:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:47,312 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:40:47,312 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:40:47,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:40:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:40:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2020-10-28 14:40:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 14:40:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-28 14:40:47,337 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 37 [2020-10-28 14:40:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:47,337 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-28 14:40:47,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:40:47,337 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-28 14:40:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:40:47,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:47,341 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:47,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:40:47,342 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:47,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1375490536, now seen corresponding path program 10 times [2020-10-28 14:40:47,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:47,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599977277] [2020-10-28 14:40:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:47,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:48,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:48,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:40:48,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:48,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-28 14:40:48,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:48,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:40:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:48,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:40:48,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:48,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:48,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:48,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:48,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:48,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:48,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:48,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:48,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:48,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:48,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:48,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599977277] [2020-10-28 14:40:48,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:48,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:40:48,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352581910] [2020-10-28 14:40:48,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:40:48,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:48,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:40:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:40:48,750 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 17 states. [2020-10-28 14:40:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:49,412 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-28 14:40:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:40:49,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-28 14:40:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:49,415 INFO L225 Difference]: With dead ends: 70 [2020-10-28 14:40:49,415 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:40:49,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:40:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:40:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-10-28 14:40:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:40:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-28 14:40:49,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 38 [2020-10-28 14:40:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:49,435 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-28 14:40:49,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:40:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-28 14:40:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:40:49,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:49,436 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:49,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:40:49,437 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:49,438 INFO L82 PathProgramCache]: Analyzing trace with hash -925973056, now seen corresponding path program 11 times [2020-10-28 14:40:49,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:49,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114240760] [2020-10-28 14:40:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:49,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:50,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:50,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:40:50,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:50,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-28 14:40:50,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:50,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:50,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:40:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:40:50,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:50,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:50,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:50,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:50,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:50,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:50,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:50,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:50,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:50,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:50,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:40:50,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114240760] [2020-10-28 14:40:50,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:50,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:40:50,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963948902] [2020-10-28 14:40:50,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:40:50,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:40:50,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:40:50,603 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 17 states. [2020-10-28 14:40:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:50,889 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-28 14:40:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:40:50,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-28 14:40:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:50,890 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:40:50,890 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:40:50,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:40:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:40:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-10-28 14:40:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:40:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-28 14:40:50,903 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-10-28 14:40:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:50,903 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-28 14:40:50,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:40:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-28 14:40:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:40:50,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:50,904 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:50,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:40:50,904 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash -293831215, now seen corresponding path program 12 times [2020-10-28 14:40:50,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:50,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792208075] [2020-10-28 14:40:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:50,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:51,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:51,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:40:51,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:51,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-28 14:40:51,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:51,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:51,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:40:51,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:51,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:40:51,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:52,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:52,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:52,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:52,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:52,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:52,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:40:52,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:52,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:52,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:52,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792208075] [2020-10-28 14:40:52,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:52,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:40:52,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241866236] [2020-10-28 14:40:52,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:40:52,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:52,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:40:52,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:40:52,150 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-28 14:40:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:52,808 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-28 14:40:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:40:52,808 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:40:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:52,809 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:40:52,809 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:40:52,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:40:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:40:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-28 14:40:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:40:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-28 14:40:52,818 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2020-10-28 14:40:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:52,818 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-28 14:40:52,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:40:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-28 14:40:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:40:52,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:52,819 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:52,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:40:52,819 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:52,820 INFO L82 PathProgramCache]: Analyzing trace with hash -205246873, now seen corresponding path program 13 times [2020-10-28 14:40:52,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:52,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425535662] [2020-10-28 14:40:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:52,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:53,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:53,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:40:53,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:53,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-28 14:40:53,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:53,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:53,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:40:53,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:53,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:40:53,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:54,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:54,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:54,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:54,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:54,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:54,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:54,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:54,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:54,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425535662] [2020-10-28 14:40:54,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:54,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:40:54,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771684880] [2020-10-28 14:40:54,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:40:54,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:54,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:40:54,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:40:54,610 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 18 states. [2020-10-28 14:40:55,383 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-28 14:40:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:55,979 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-28 14:40:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:40:55,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-28 14:40:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:55,980 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:40:55,981 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:40:55,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:40:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:40:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-28 14:40:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:40:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-28 14:40:55,990 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2020-10-28 14:40:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:55,990 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-28 14:40:55,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:40:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-28 14:40:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:40:55,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:55,991 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:55,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:40:55,992 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash 274175928, now seen corresponding path program 14 times [2020-10-28 14:40:55,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:55,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453176479] [2020-10-28 14:40:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:56,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:56,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:40:56,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:56,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-28 14:40:56,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:56,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:40:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:56,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:40:56,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:57,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:57,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:57,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:57,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:57,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:57,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:57,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:57,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:57,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:57,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453176479] [2020-10-28 14:40:57,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:57,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:40:57,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195816188] [2020-10-28 14:40:57,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:40:57,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:57,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:40:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:40:57,579 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 19 states. [2020-10-28 14:40:58,149 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-28 14:40:58,458 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-28 14:40:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:59,145 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-28 14:40:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:40:59,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-28 14:40:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:59,146 INFO L225 Difference]: With dead ends: 68 [2020-10-28 14:40:59,146 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 14:40:59,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:40:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 14:40:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-28 14:40:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:40:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-28 14:40:59,160 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 44 [2020-10-28 14:40:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:59,160 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-28 14:40:59,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:40:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-28 14:40:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:40:59,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:59,161 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:59,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:40:59,161 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash 223105376, now seen corresponding path program 15 times [2020-10-28 14:40:59,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:59,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35257798] [2020-10-28 14:40:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:59,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:00,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:00,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:41:00,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:00,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-28 14:41:00,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:00,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:00,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:41:00,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:00,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:41:00,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:00,671 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 14:41:01,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:01,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:01,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:01,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:01,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:01,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:01,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:01,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:01,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:01,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:01,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:01,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35257798] [2020-10-28 14:41:01,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:01,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:41:01,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963000235] [2020-10-28 14:41:01,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:41:01,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:41:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:41:01,453 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 20 states. [2020-10-28 14:41:02,101 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-28 14:41:02,284 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-28 14:41:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:02,936 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-28 14:41:02,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:41:02,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-28 14:41:02,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:02,937 INFO L225 Difference]: With dead ends: 82 [2020-10-28 14:41:02,938 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 14:41:02,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:41:02,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 14:41:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-28 14:41:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:41:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-28 14:41:02,948 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 45 [2020-10-28 14:41:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:02,948 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-28 14:41:02,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:41:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-28 14:41:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:41:02,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:02,949 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:02,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:41:02,950 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1992581319, now seen corresponding path program 16 times [2020-10-28 14:41:02,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:02,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19847820] [2020-10-28 14:41:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:03,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:03,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:03,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:41:03,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:03,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-28 14:41:03,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:03,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:03,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:41:03,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:03,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:41:03,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:05,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:05,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:05,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:05,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:05,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:05,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:05,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:05,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:05,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:05,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:05,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:05,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19847820] [2020-10-28 14:41:05,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:05,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:41:05,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822283543] [2020-10-28 14:41:05,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:41:05,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:05,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:41:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:41:05,069 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 19 states. [2020-10-28 14:41:05,854 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-28 14:41:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:06,481 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-28 14:41:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:41:06,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-28 14:41:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:06,486 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:41:06,486 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:41:06,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:41:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:41:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-28 14:41:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:41:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-28 14:41:06,493 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-28 14:41:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:06,493 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-28 14:41:06,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:41:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-28 14:41:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:41:06,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:06,494 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:06,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:41:06,494 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash 968189471, now seen corresponding path program 17 times [2020-10-28 14:41:06,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:06,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461628955] [2020-10-28 14:41:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:06,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:07,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:41:07,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:07,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-10-28 14:41:07,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:07,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:41:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:41:07,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:08,102 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:41:08,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:08,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:08,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:08,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:08,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:08,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:08,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:08,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:08,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:08,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:08,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:08,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:08,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461628955] [2020-10-28 14:41:08,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:08,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:41:08,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368545884] [2020-10-28 14:41:08,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:41:08,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:41:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:41:08,851 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2020-10-28 14:41:09,447 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-28 14:41:09,815 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-28 14:41:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:10,489 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-28 14:41:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:41:10,491 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-28 14:41:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:10,492 INFO L225 Difference]: With dead ends: 72 [2020-10-28 14:41:10,492 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 14:41:10,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:41:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 14:41:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-28 14:41:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:41:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-28 14:41:10,501 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 48 [2020-10-28 14:41:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:10,501 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-28 14:41:10,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:41:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-28 14:41:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:41:10,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:10,502 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:10,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:41:10,502 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:10,503 INFO L82 PathProgramCache]: Analyzing trace with hash 262688729, now seen corresponding path program 18 times [2020-10-28 14:41:10,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:10,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521312734] [2020-10-28 14:41:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:11,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:11,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:41:11,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:11,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1138 [2020-10-28 14:41:11,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:11,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:11,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:41:11,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:11,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:41:11,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:12,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:12,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:12,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:12,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:12,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:12,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:12,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:12,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:12,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:12,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:12,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:12,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:12,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521312734] [2020-10-28 14:41:12,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:12,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:41:12,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066873396] [2020-10-28 14:41:12,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:41:12,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:41:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:41:12,915 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-28 14:41:13,550 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-28 14:41:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:13,939 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-28 14:41:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:41:13,939 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-28 14:41:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:13,940 INFO L225 Difference]: With dead ends: 73 [2020-10-28 14:41:13,941 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 14:41:13,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:41:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 14:41:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-28 14:41:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:41:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-28 14:41:13,951 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 49 [2020-10-28 14:41:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:13,951 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-28 14:41:13,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:41:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-28 14:41:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:41:13,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:13,952 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:13,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:41:13,952 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1377477888, now seen corresponding path program 19 times [2020-10-28 14:41:13,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:13,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134102407] [2020-10-28 14:41:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:14,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:15,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:15,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:41:15,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:15,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-28 14:41:15,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:15,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:15,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:41:15,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:15,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:41:15,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:15,634 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-28 14:41:16,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:16,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:16,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:16,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:16,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:16,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:16,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:16,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:16,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:16,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:16,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:16,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134102407] [2020-10-28 14:41:16,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:16,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:41:16,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557182131] [2020-10-28 14:41:16,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:41:16,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:41:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:41:16,326 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-28 14:41:16,947 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-28 14:41:17,329 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-28 14:41:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:18,208 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-28 14:41:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:41:18,209 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-28 14:41:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:18,210 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:41:18,210 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 14:41:18,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:41:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 14:41:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-10-28 14:41:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:41:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-28 14:41:18,222 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2020-10-28 14:41:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:18,222 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-28 14:41:18,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:41:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-28 14:41:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:41:18,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:18,223 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:18,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:41:18,223 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:18,224 INFO L82 PathProgramCache]: Analyzing trace with hash -920147706, now seen corresponding path program 20 times [2020-10-28 14:41:18,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:18,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893881394] [2020-10-28 14:41:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:19,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:19,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:41:19,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:19,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1093 [2020-10-28 14:41:19,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:19,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:41:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:41:19,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:19,768 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-28 14:41:20,150 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-28 14:41:20,680 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-28 14:41:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:21,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:21,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:21,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:21,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:21,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:21,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:21,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:21,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:21,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893881394] [2020-10-28 14:41:21,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:21,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:41:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697211143] [2020-10-28 14:41:21,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:41:21,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:41:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:41:21,232 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 23 states. [2020-10-28 14:41:22,082 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-28 14:41:22,440 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-28 14:41:22,774 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-28 14:41:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:23,557 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-28 14:41:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:41:23,558 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-28 14:41:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:23,559 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:41:23,559 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:41:23,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:41:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:41:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2020-10-28 14:41:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 14:41:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-28 14:41:23,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 52 [2020-10-28 14:41:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:23,570 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-28 14:41:23,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:41:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-28 14:41:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:41:23,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:23,571 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:23,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:41:23,571 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1076555391, now seen corresponding path program 21 times [2020-10-28 14:41:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:23,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718594816] [2020-10-28 14:41:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:23,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:24,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:24,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:41:24,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:24,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 893 [2020-10-28 14:41:24,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:24,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:24,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:41:24,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:24,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:41:24,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:25,222 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-28 14:41:25,634 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-28 14:41:26,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:26,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:26,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:26,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:26,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:26,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:26,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:26,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:26,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:26,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:26,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718594816] [2020-10-28 14:41:26,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:26,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:41:26,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627279864] [2020-10-28 14:41:26,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:41:26,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:41:26,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:41:26,188 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 22 states. [2020-10-28 14:41:26,746 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-28 14:41:27,111 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-28 14:41:27,529 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2020-10-28 14:41:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:28,375 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-10-28 14:41:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:41:28,375 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-28 14:41:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:28,376 INFO L225 Difference]: With dead ends: 91 [2020-10-28 14:41:28,376 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 14:41:28,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:41:28,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 14:41:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-28 14:41:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:41:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-28 14:41:28,387 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 54 [2020-10-28 14:41:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:28,387 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-28 14:41:28,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:41:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-28 14:41:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:41:28,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:28,388 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:28,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:41:28,388 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:28,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1406280889, now seen corresponding path program 22 times [2020-10-28 14:41:28,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:28,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736991674] [2020-10-28 14:41:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:28,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:29,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:29,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:41:29,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:29,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-28 14:41:29,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:29,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:41:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 14:41:29,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:30,030 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-28 14:41:30,219 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-28 14:41:30,456 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-28 14:41:30,834 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-28 14:41:31,118 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-28 14:41:31,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:31,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:31,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:31,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:31,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:31,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736991674] [2020-10-28 14:41:31,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:31,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:41:31,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637740406] [2020-10-28 14:41:31,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:41:31,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:41:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:41:31,706 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 24 states. [2020-10-28 14:41:32,580 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:41:32,930 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-28 14:41:33,376 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-28 14:41:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:34,198 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-28 14:41:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:41:34,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-28 14:41:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:34,200 INFO L225 Difference]: With dead ends: 82 [2020-10-28 14:41:34,200 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 14:41:34,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:41:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 14:41:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-10-28 14:41:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:41:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-28 14:41:34,211 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-10-28 14:41:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:34,211 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-28 14:41:34,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:41:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-28 14:41:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:41:34,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:34,212 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:34,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:41:34,212 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash -27254675, now seen corresponding path program 23 times [2020-10-28 14:41:34,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:34,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200006416] [2020-10-28 14:41:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:34,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:35,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:35,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:41:35,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:35,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-10-28 14:41:35,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:35,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:41:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:41:35,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:35,954 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-28 14:41:36,108 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-28 14:41:36,310 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-28 14:41:36,563 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-28 14:41:37,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:37,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:37,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:37,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200006416] [2020-10-28 14:41:37,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:37,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:41:37,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738973824] [2020-10-28 14:41:37,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:41:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:37,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:41:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:37,553 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 25 states. [2020-10-28 14:41:38,426 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-28 14:41:38,775 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-28 14:41:39,051 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 85 [2020-10-28 14:41:39,349 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 90 [2020-10-28 14:41:39,686 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 83 [2020-10-28 14:41:40,026 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 86 [2020-10-28 14:41:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:40,590 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-28 14:41:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:41:40,591 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-28 14:41:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:40,592 INFO L225 Difference]: With dead ends: 83 [2020-10-28 14:41:40,592 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:41:40,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:41:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:41:40,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-28 14:41:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:41:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-28 14:41:40,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 56 [2020-10-28 14:41:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:40,605 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-28 14:41:40,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:41:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-28 14:41:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 14:41:40,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:40,605 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:40,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:41:40,606 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash 153298982, now seen corresponding path program 24 times [2020-10-28 14:41:40,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:40,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138606314] [2020-10-28 14:41:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:40,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:41,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:41,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:41:41,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:41,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-28 14:41:41,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:41,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:41,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:41:41,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:41,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:41:41,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:42,365 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 14:41:42,675 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-28 14:41:42,980 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-28 14:41:43,120 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-28 14:41:43,271 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-28 14:41:44,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:44,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:44,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:44,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:44,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:44,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:44,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:44,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:44,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:44,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138606314] [2020-10-28 14:41:44,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:44,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:41:44,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91010394] [2020-10-28 14:41:44,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:41:44,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:41:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:44,098 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 25 states. [2020-10-28 14:41:44,896 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:41:45,279 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:41:45,462 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:41:45,776 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 92 [2020-10-28 14:41:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:46,781 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-28 14:41:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:41:46,781 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-28 14:41:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:46,782 INFO L225 Difference]: With dead ends: 88 [2020-10-28 14:41:46,783 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 14:41:46,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=159, Invalid=1733, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:41:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 14:41:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2020-10-28 14:41:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:41:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-28 14:41:46,794 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 58 [2020-10-28 14:41:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:46,795 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-28 14:41:46,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:41:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-28 14:41:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:41:46,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:46,795 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:46,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:41:46,796 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1444864014, now seen corresponding path program 25 times [2020-10-28 14:41:46,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:46,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604962187] [2020-10-28 14:41:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1285 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:41:48,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:48,792 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-28 14:41:49,032 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 14:41:49,218 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-28 14:41:49,447 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-10-28 14:41:49,782 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-28 14:41:50,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:50,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:50,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:50,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:50,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604962187] [2020-10-28 14:41:50,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:50,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:41:50,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229727959] [2020-10-28 14:41:50,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:41:50,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:50,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:41:50,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:41:50,515 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 26 states. [2020-10-28 14:41:51,087 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-28 14:41:51,430 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-28 14:41:51,836 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-28 14:41:52,038 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-28 14:41:52,346 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 87 [2020-10-28 14:41:52,531 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:41:52,823 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 92 [2020-10-28 14:41:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:53,948 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-28 14:41:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:41:53,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-28 14:41:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:53,951 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:41:53,951 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:41:53,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:41:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:41:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2020-10-28 14:41:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:41:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-28 14:41:53,967 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 59 [2020-10-28 14:41:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:53,967 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-28 14:41:53,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:41:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-28 14:41:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:41:53,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:53,968 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:53,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:41:53,968 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash 130077081, now seen corresponding path program 26 times [2020-10-28 14:41:53,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:53,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734724778] [2020-10-28 14:41:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:54,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:55,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:55,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:41:55,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1533 [2020-10-28 14:41:55,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:55,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:41:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 14:41:55,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:56,238 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-28 14:41:56,368 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-28 14:41:56,574 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-28 14:41:56,739 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-28 14:41:56,970 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-28 14:41:57,168 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-28 14:41:57,349 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-28 14:41:57,522 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-28 14:41:58,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:58,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:58,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734724778] [2020-10-28 14:41:58,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:58,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:41:58,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500545618] [2020-10-28 14:41:58,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:41:58,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:58,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:41:58,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:58,171 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 25 states. [2020-10-28 14:41:58,886 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2020-10-28 14:41:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:59,850 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-28 14:41:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:41:59,851 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-28 14:41:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:59,852 INFO L225 Difference]: With dead ends: 101 [2020-10-28 14:41:59,852 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:41:59,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:41:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:41:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-28 14:41:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:41:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-28 14:41:59,868 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-28 14:41:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:59,868 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-28 14:41:59,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:41:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-28 14:41:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:41:59,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:59,869 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:59,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:41:59,870 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:59,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1031260595, now seen corresponding path program 27 times [2020-10-28 14:41:59,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:59,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505109486] [2020-10-28 14:41:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:00,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:01,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:01,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:42:01,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:01,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1702 [2020-10-28 14:42:01,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:01,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:01,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:42:01,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:01,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:42:01,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:02,209 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-28 14:42:02,485 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-28 14:42:02,612 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-28 14:42:02,843 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-28 14:42:03,003 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-28 14:42:03,251 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-10-28 14:42:03,622 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-28 14:42:04,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:04,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:04,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:04,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505109486] [2020-10-28 14:42:04,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:04,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:42:04,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825718276] [2020-10-28 14:42:04,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:42:04,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:42:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:42:04,436 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 27 states. [2020-10-28 14:42:05,666 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 92 [2020-10-28 14:42:05,886 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-28 14:42:06,252 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 97 [2020-10-28 14:42:06,466 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-28 14:42:06,659 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-28 14:42:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:07,520 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-28 14:42:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:42:07,520 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-28 14:42:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:07,521 INFO L225 Difference]: With dead ends: 92 [2020-10-28 14:42:07,522 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 14:42:07,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:42:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 14:42:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2020-10-28 14:42:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:42:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-28 14:42:07,535 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 62 [2020-10-28 14:42:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:07,535 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-28 14:42:07,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:42:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-28 14:42:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 14:42:07,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:07,536 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:07,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:42:07,537 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash 488494763, now seen corresponding path program 28 times [2020-10-28 14:42:07,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:07,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763405391] [2020-10-28 14:42:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:07,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:09,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1979 [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 14:42:09,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:10,145 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-28 14:42:10,456 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-28 14:42:10,589 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-28 14:42:10,816 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-28 14:42:11,147 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-28 14:42:11,553 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-28 14:42:11,741 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-28 14:42:11,940 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-28 14:42:12,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:12,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:12,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:12,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:12,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:12,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:12,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:12,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:12,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:12,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:12,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:12,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 2 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:12,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763405391] [2020-10-28 14:42:12,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:12,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:42:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403688466] [2020-10-28 14:42:12,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:42:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:42:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:42:12,726 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-28 14:42:13,992 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 86 [2020-10-28 14:42:14,214 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-28 14:42:14,541 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-28 14:42:14,963 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 107 [2020-10-28 14:42:15,467 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 114 [2020-10-28 14:42:15,995 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 98 [2020-10-28 14:42:16,577 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 108 [2020-10-28 14:42:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:17,174 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-28 14:42:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:42:17,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-28 14:42:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:17,176 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:42:17,176 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:42:17,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:42:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:42:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2020-10-28 14:42:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:42:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-28 14:42:17,192 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-10-28 14:42:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:17,192 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-28 14:42:17,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:42:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-28 14:42:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:42:17,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:17,193 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:17,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:42:17,194 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:17,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1632977390, now seen corresponding path program 29 times [2020-10-28 14:42:17,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:17,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608090584] [2020-10-28 14:42:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:17,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:18,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:18,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:42:18,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:18,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-28 14:42:18,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:18,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:42:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 14:42:18,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:19,683 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 14:42:19,962 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-28 14:42:20,271 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-28 14:42:20,434 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-28 14:42:20,713 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-28 14:42:21,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:21,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:21,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:21,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:21,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:21,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:21,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:21,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:21,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:21,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608090584] [2020-10-28 14:42:21,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:21,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:42:21,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981658948] [2020-10-28 14:42:21,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:42:21,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:21,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:42:21,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:42:21,873 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-28 14:42:22,613 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-28 14:42:23,022 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:42:23,224 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:42:23,475 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-28 14:42:23,711 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:42:24,138 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 109 [2020-10-28 14:42:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:25,446 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-28 14:42:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:42:25,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-28 14:42:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:25,449 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:42:25,449 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 14:42:25,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=177, Invalid=2175, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:42:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 14:42:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2020-10-28 14:42:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 14:42:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-28 14:42:25,466 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 65 [2020-10-28 14:42:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:25,466 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-28 14:42:25,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:42:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-28 14:42:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:42:25,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:25,467 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:25,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:42:25,467 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:25,468 INFO L82 PathProgramCache]: Analyzing trace with hash 148625652, now seen corresponding path program 30 times [2020-10-28 14:42:25,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:25,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738310943] [2020-10-28 14:42:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:25,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:27,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:27,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:42:27,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:27,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1723 [2020-10-28 14:42:27,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:27,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:42:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 14:42:27,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:27,969 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-28 14:42:28,288 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:42:28,641 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-28 14:42:28,991 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-28 14:42:29,402 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-10-28 14:42:29,672 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-28 14:42:29,947 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-28 14:42:30,108 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 14:42:30,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:31,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:31,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:31,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:31,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:31,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:31,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738310943] [2020-10-28 14:42:31,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:31,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:42:31,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240969622] [2020-10-28 14:42:31,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:42:31,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:31,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:42:31,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:42:31,072 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 29 states. [2020-10-28 14:42:32,018 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-28 14:42:32,469 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-28 14:42:32,675 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:42:32,988 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-28 14:42:33,223 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-28 14:42:33,602 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 100 [2020-10-28 14:42:33,843 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-28 14:42:34,254 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 111 [2020-10-28 14:42:34,883 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-28 14:42:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:35,722 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2020-10-28 14:42:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:42:35,722 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-28 14:42:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:35,724 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:42:35,724 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 14:42:35,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=195, Invalid=2355, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:42:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 14:42:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-28 14:42:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 14:42:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-28 14:42:35,743 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 66 [2020-10-28 14:42:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:35,743 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-28 14:42:35,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:42:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-28 14:42:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:42:35,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:35,744 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:35,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:42:35,744 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash -184523731, now seen corresponding path program 31 times [2020-10-28 14:42:35,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:35,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93410823] [2020-10-28 14:42:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:37,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:37,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:42:37,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:37,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1612 [2020-10-28 14:42:37,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:37,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:42:37,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 14:42:37,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:38,094 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-28 14:42:38,277 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-28 14:42:38,631 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-10-28 14:42:38,789 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-28 14:42:39,056 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-28 14:42:39,262 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-28 14:42:39,469 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-28 14:42:39,657 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-28 14:42:40,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:40,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:40,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:40,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:40,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93410823] [2020-10-28 14:42:40,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:40,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:42:40,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228053239] [2020-10-28 14:42:40,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:42:40,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:42:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:42:40,656 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 28 states. [2020-10-28 14:42:41,225 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-10-28 14:42:41,660 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-28 14:42:41,876 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-28 14:42:42,170 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-28 14:42:42,410 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-28 14:42:42,794 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2020-10-28 14:42:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:43,996 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-28 14:42:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:42:43,997 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-10-28 14:42:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:43,998 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:42:43,998 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 14:42:44,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:42:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 14:42:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-28 14:42:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 14:42:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-28 14:42:44,015 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2020-10-28 14:42:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:44,015 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-28 14:42:44,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:42:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-28 14:42:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:42:44,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:44,016 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:44,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:42:44,016 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1654143477, now seen corresponding path program 32 times [2020-10-28 14:42:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:44,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200705554] [2020-10-28 14:42:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:44,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2481 [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:46,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 14:42:46,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:47,233 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-28 14:42:47,452 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-28 14:42:47,730 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-28 14:42:48,137 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-28 14:42:48,328 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-28 14:42:48,615 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-10-28 14:42:49,172 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-28 14:42:50,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:50,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:50,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:50,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:50,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:42:50,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:50,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:50,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:50,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:50,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:50,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:50,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200705554] [2020-10-28 14:42:50,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:50,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:42:50,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608095454] [2020-10-28 14:42:50,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:42:50,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:42:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:42:50,180 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2020-10-28 14:42:51,296 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2020-10-28 14:42:51,519 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-28 14:42:51,823 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-28 14:42:52,073 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-28 14:42:52,436 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-28 14:42:52,703 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-28 14:42:53,164 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 115 [2020-10-28 14:42:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:54,583 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-28 14:42:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:42:54,584 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-28 14:42:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:54,585 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:42:54,585 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:42:54,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:42:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:42:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-28 14:42:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 14:42:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-28 14:42:54,602 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 69 [2020-10-28 14:42:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:54,602 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-28 14:42:54,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:42:54,602 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-28 14:42:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 14:42:54,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:54,603 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:54,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:42:54,603 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash -507523045, now seen corresponding path program 33 times [2020-10-28 14:42:54,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:54,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399060768] [2020-10-28 14:42:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:57,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:57,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 14:42:57,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:57,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2326 [2020-10-28 14:42:57,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:57,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:42:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 14:42:57,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:57,643 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-28 14:42:57,933 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-28 14:42:58,182 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-28 14:42:58,569 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-28 14:42:58,744 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-28 14:42:59,070 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 88 [2020-10-28 14:42:59,283 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-28 14:42:59,632 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92 [2020-10-28 14:42:59,954 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 14:43:00,199 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-10-28 14:43:00,456 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-10-28 14:43:00,678 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-28 14:43:01,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:01,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:01,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:01,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:01,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:43:01,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:01,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:43:01,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399060768] [2020-10-28 14:43:01,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:01,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:43:01,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576174604] [2020-10-28 14:43:01,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:43:01,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:01,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:43:01,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:43:01,615 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-10-28 14:43:02,477 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-28 14:43:02,951 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-28 14:43:03,186 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-28 14:43:03,512 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-28 14:43:03,781 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-28 14:43:04,107 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-28 14:43:04,385 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-28 14:43:04,895 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 120 [2020-10-28 14:43:05,419 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 110 [2020-10-28 14:43:05,970 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-28 14:43:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:06,998 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-28 14:43:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:43:06,999 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-28 14:43:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:07,000 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:43:07,000 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:43:07,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=210, Invalid=2546, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:43:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:43:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2020-10-28 14:43:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 14:43:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-28 14:43:07,021 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 70 [2020-10-28 14:43:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:07,021 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-28 14:43:07,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:43:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-28 14:43:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:43:07,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:07,022 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:07,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:43:07,022 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash 616770964, now seen corresponding path program 34 times [2020-10-28 14:43:07,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:07,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742967493] [2020-10-28 14:43:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:09,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2533 [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 14:43:09,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:10,538 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-28 14:43:10,799 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-28 14:43:10,943 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 14:43:11,142 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-28 14:43:11,404 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-28 14:43:11,896 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-10-28 14:43:12,393 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 116 [2020-10-28 14:43:13,347 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 130 [2020-10-28 14:43:14,278 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2020-10-28 14:43:15,576 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-10-28 14:43:15,952 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 73 [2020-10-28 14:43:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:16,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:16,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:16,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:43:17,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742967493] [2020-10-28 14:43:17,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:17,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:43:17,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382685003] [2020-10-28 14:43:17,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:43:17,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:17,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:43:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:43:17,040 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-10-28 14:43:18,004 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-28 14:43:19,229 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 129 [2020-10-28 14:43:19,827 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-28 14:43:21,811 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 234 DAG size of output: 175 [2020-10-28 14:43:22,878 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 160 [2020-10-28 14:43:26,366 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 288 DAG size of output: 238 [2020-10-28 14:43:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:28,460 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-28 14:43:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:43:28,460 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-28 14:43:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:28,463 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:43:28,463 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:43:28,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=193, Invalid=2563, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:43:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:43:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-28 14:43:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:43:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-28 14:43:28,488 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 72 [2020-10-28 14:43:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:28,488 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-28 14:43:28,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:43:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-28 14:43:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 14:43:28,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:28,489 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:28,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:43:28,489 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:28,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1711155588, now seen corresponding path program 35 times [2020-10-28 14:43:28,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:28,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886863286] [2020-10-28 14:43:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:28,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:32,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:32,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 14:43:32,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:32,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3505 [2020-10-28 14:43:32,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:32,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:32,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:43:32,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:32,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 14:43:32,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:32,875 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-28 14:43:33,115 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-28 14:43:33,276 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-28 14:43:33,581 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-28 14:43:33,749 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-28 14:43:34,184 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-28 14:43:34,602 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2020-10-28 14:43:34,993 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-28 14:43:35,486 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-28 14:43:36,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:36,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:36,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:43:36,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886863286] [2020-10-28 14:43:36,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:36,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:43:36,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582375455] [2020-10-28 14:43:36,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:43:36,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:36,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:43:36,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:43:36,500 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 32 states. [2020-10-28 14:43:37,769 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-28 14:43:38,058 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-28 14:43:38,746 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 125 [2020-10-28 14:43:39,403 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 109 [2020-10-28 14:43:40,020 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 112 [2020-10-28 14:43:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:40,957 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-28 14:43:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:43:40,958 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-28 14:43:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:40,958 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:43:40,959 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:43:40,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:43:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:43:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 81. [2020-10-28 14:43:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:43:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-28 14:43:40,978 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 73 [2020-10-28 14:43:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:40,979 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-28 14:43:40,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:43:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-28 14:43:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 14:43:40,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:40,980 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:40,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:43:40,980 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:40,981 INFO L82 PathProgramCache]: Analyzing trace with hash -895963797, now seen corresponding path program 36 times [2020-10-28 14:43:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:40,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26189431] [2020-10-28 14:43:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:43,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:43,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 14:43:43,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:43,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2411 [2020-10-28 14:43:43,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:43,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:43:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:43,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 14:43:43,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:44,405 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-28 14:43:44,728 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-28 14:43:45,356 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-10-28 14:43:45,899 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2020-10-28 14:43:46,121 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-28 14:43:46,335 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-28 14:43:47,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:47,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:47,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:47,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:43:47,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26189431] [2020-10-28 14:43:47,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:47,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:43:47,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614073847] [2020-10-28 14:43:47,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:43:47,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:43:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:43:47,590 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 31 states. [2020-10-28 14:43:48,235 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-28 14:43:48,782 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 14:43:49,054 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 14:43:49,639 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2020-10-28 14:43:49,987 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-28 14:43:50,922 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 100 [2020-10-28 14:43:51,354 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-28 14:43:52,331 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 133 [2020-10-28 14:43:52,878 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-10-28 14:43:54,224 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 176 DAG size of output: 160 [2020-10-28 14:43:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:56,296 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2020-10-28 14:43:56,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:43:56,297 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-10-28 14:43:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:56,297 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:43:56,297 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:43:56,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=167, Invalid=2589, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:43:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:43:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-28 14:43:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 14:43:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-28 14:43:56,315 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2020-10-28 14:43:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:56,315 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-28 14:43:56,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:43:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-28 14:43:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 14:43:56,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:56,316 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:56,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:43:56,316 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1180374149, now seen corresponding path program 37 times [2020-10-28 14:43:56,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:56,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003171510] [2020-10-28 14:43:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:56,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:59,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:59,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 14:43:59,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:59,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3438 [2020-10-28 14:43:59,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:59,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:43:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:59,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 14:43:59,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:00,867 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-28 14:44:00,998 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 14:44:01,243 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-28 14:44:01,414 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-28 14:44:01,733 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-10-28 14:44:01,958 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2020-10-28 14:44:02,425 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2020-10-28 14:44:02,834 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2020-10-28 14:44:03,458 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 100 [2020-10-28 14:44:03,834 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2020-10-28 14:44:04,372 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 109 [2020-10-28 14:44:04,738 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2020-10-28 14:44:05,119 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-10-28 14:44:05,479 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-28 14:44:06,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:06,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:06,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:06,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:06,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:06,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:06,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:06,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:06,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:06,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003171510] [2020-10-28 14:44:06,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:06,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:44:06,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347767892] [2020-10-28 14:44:06,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:44:06,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:06,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:44:06,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:44:06,969 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 33 states. [2020-10-28 14:44:08,407 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 84 [2020-10-28 14:44:08,696 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-28 14:44:09,087 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-10-28 14:44:09,455 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-28 14:44:09,910 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-10-28 14:44:10,293 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-28 14:44:10,834 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 110