/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-data/shared_mem1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:09:57,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:09:57,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:09:57,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:09:57,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:09:57,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:09:57,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:09:57,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:09:57,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:09:57,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:09:57,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:09:57,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:09:57,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:09:57,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:09:57,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:09:57,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:09:57,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:09:57,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:09:57,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:09:57,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:09:57,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:09:57,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:09:57,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:09:57,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:09:57,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:09:57,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:09:57,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:09:57,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:09:57,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:09:57,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:09:57,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:09:57,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:09:57,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:09:57,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:09:57,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:09:57,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:09:57,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:09:57,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:09:57,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:09:57,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:09:57,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:09:57,980 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 [2020-10-27 01:09:58,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:09:58,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:09:58,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:09:58,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:09:58,035 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:09:58,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:09:58,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:09:58,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:09:58,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:09:58,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:09:58,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:09:58,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:09:58,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:09:58,038 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:09:58,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:09:58,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:09:58,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:09:58,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:09:58,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:09:58,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:09:58,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:09:58,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:09:58,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:09:58,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:09:58,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:09:58,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:09:58,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:09:58,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:09:58,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:09:58,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:09:58,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:09:58,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:09:58,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:09:58,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:09:58,488 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:09:58,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-27 01:09:58,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b39669b7/7e31677a881d43a698c46c700458eeec/FLAGe1aa5ffe3 [2020-10-27 01:09:59,205 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:09:59,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-27 01:09:59,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b39669b7/7e31677a881d43a698c46c700458eeec/FLAGe1aa5ffe3 [2020-10-27 01:09:59,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b39669b7/7e31677a881d43a698c46c700458eeec [2020-10-27 01:09:59,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:09:59,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:09:59,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:09:59,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:09:59,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:09:59,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:09:59" (1/1) ... [2020-10-27 01:09:59,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e118aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:59, skipping insertion in model container [2020-10-27 01:09:59,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:09:59" (1/1) ... [2020-10-27 01:09:59,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:09:59,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:09:59,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:09:59,910 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:09:59,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:10:00,034 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:10:00,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00 WrapperNode [2020-10-27 01:10:00,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:10:00,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:10:00,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:10:00,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:10:00,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (1/1) ... [2020-10-27 01:10:00,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (1/1) ... [2020-10-27 01:10:00,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (1/1) ... [2020-10-27 01:10:00,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (1/1) ... [2020-10-27 01:10:00,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (1/1) ... [2020-10-27 01:10:00,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (1/1) ... [2020-10-27 01:10:00,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (1/1) ... [2020-10-27 01:10:00,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:10:00,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:10:00,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:10:00,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:10:00,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (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 [2020-10-27 01:10:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:10:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:10:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:10:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:10:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:10:00,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:10:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:10:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:10:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:10:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:10:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:10:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:10:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:10:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:10:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:10:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:10:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:10:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:10:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:10:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:10:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:10:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:10:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:10:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:10:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:10:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:10:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:10:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:10:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:10:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:10:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:10:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:10:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:10:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:10:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:10:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:10:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:10:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:10:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:10:00,241 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:10:00,241 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:10:00,241 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:10:00,241 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:10:00,241 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:10:00,241 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:10:00,241 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:10:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:10:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:10:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:10:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:10:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:10:00,242 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:10:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:10:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:10:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:10:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:10:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:10:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:10:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:10:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:10:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:10:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:10:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:10:00,244 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:10:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:10:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:10:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:10:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:10:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:10:00,245 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:10:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:10:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:10:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:10:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:10:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:10:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:10:00,261 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:10:00,261 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:10:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:10:00,271 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:10:00,271 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:10:00,271 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:10:00,272 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:10:00,272 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:10:00,272 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:10:00,272 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:10:00,272 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:10:00,272 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:10:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:10:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:10:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:10:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:10:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:10:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:10:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:10:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:10:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:10:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:10:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:10:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:10:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:10:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:10:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:10:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:10:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:10:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:10:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:10:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:10:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:10:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:10:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:10:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:10:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:10:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:10:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:10:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:10:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:10:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:10:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:10:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:10:00,877 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:10:00,877 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:10:00,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:10:00 BoogieIcfgContainer [2020-10-27 01:10:00,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:10:00,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:10:00,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:10:00,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:10:00,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:09:59" (1/3) ... [2020-10-27 01:10:00,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c5d9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:10:00, skipping insertion in model container [2020-10-27 01:10:00,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:10:00" (2/3) ... [2020-10-27 01:10:00,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c5d9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:10:00, skipping insertion in model container [2020-10-27 01:10:00,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:10:00" (3/3) ... [2020-10-27 01:10:00,888 INFO L111 eAbstractionObserver]: Analyzing ICFG shared_mem1.i [2020-10-27 01:10:00,901 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:10:00,906 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:10:00,920 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:10:00,948 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:10:00,949 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:10:00,949 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:10:00,949 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:10:00,949 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:10:00,949 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:10:00,949 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:10:00,950 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:10:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:10:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:10:00,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:00,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:00,975 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash 270174809, now seen corresponding path program 1 times [2020-10-27 01:10:00,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:00,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880356342] [2020-10-27 01:10:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:01,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:01,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:01,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:01,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:10:01,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:01,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-27 01:10:01,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:01,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:10:01,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:01,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:10:01,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:10:02,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:02,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:02,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:02,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:02,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:02,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:10:02,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:02,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:02,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880356342] [2020-10-27 01:10:02,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:10:02,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:10:02,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094257666] [2020-10-27 01:10:02,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:10:02,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:02,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:10:02,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:10:02,231 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 7 states. [2020-10-27 01:10:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:02,530 INFO L93 Difference]: Finished difference Result 56 states and 83 transitions. [2020-10-27 01:10:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:10:02,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-27 01:10:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:02,541 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:10:02,541 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:10:02,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:10:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:10:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-27 01:10:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:10:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-27 01:10:02,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2020-10-27 01:10:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:02,591 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-27 01:10:02,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:10:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-27 01:10:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:10:02,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:02,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:02,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:10:02,593 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1457013005, now seen corresponding path program 1 times [2020-10-27 01:10:02,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:02,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849570418] [2020-10-27 01:10:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:02,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:03,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:10:03,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:03,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-27 01:10:03,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:03,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:10:03,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:03,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:10:03,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:03,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:03,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:03,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:03,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:03,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:10:03,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:03,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:03,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:03,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:03,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:03,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849570418] [2020-10-27 01:10:03,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:10:03,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:10:03,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148565532] [2020-10-27 01:10:03,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:10:03,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:03,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:10:03,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:10:03,221 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 7 states. [2020-10-27 01:10:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:03,526 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-27 01:10:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:10:03,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-27 01:10:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:03,528 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:10:03,528 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:10:03,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:10:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:10:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-27 01:10:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:10:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 01:10:03,537 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2020-10-27 01:10:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:03,538 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 01:10:03,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:10:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 01:10:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:10:03,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:03,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:03,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:10:03,540 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash 317994357, now seen corresponding path program 1 times [2020-10-27 01:10:03,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:03,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804502524] [2020-10-27 01:10:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:03,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:04,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:04,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:10:04,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:10:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-27 01:10:04,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:10:04,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:04,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:10:04,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:04,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:04,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:04,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:04,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:04,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:04,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:10:04,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:04,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:04,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804502524] [2020-10-27 01:10:04,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:10:04,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:10:04,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849357037] [2020-10-27 01:10:04,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:10:04,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:10:04,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:10:04,305 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 6 states. [2020-10-27 01:10:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:04,508 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-10-27 01:10:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:10:04,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:10:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:04,510 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:10:04,510 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:10:04,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:10:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:10:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 01:10:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:10:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-10-27 01:10:04,525 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 17 [2020-10-27 01:10:04,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:04,526 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-10-27 01:10:04,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:10:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-10-27 01:10:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:10:04,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:04,528 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:04,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:10:04,529 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:04,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1676333536, now seen corresponding path program 1 times [2020-10-27 01:10:04,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:04,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62011933] [2020-10-27 01:10:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:05,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:05,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:10:05,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:05,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-27 01:10:05,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:05,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:10:05,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:10:05,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:10:05,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:05,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:05,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:05,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:05,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:05,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:10:05,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:05,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:05,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:05,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:05,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:05,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62011933] [2020-10-27 01:10:05,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:05,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:10:05,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156660860] [2020-10-27 01:10:05,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:10:05,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:10:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:10:05,331 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 8 states. [2020-10-27 01:10:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:05,493 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-10-27 01:10:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:10:05,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:10:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:05,496 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:10:05,497 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:10:05,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:10:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:10:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-10-27 01:10:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:10:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2020-10-27 01:10:05,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 20 [2020-10-27 01:10:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:05,515 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2020-10-27 01:10:05,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:10:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2020-10-27 01:10:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:10:05,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:05,518 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:05,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:10:05,518 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:05,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1674486494, now seen corresponding path program 1 times [2020-10-27 01:10:05,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:05,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593152012] [2020-10-27 01:10:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:05,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:05,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:06,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:06,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:10:06,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:06,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-27 01:10:06,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:10:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:10:06,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:10:06,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:06,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:06,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:06,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:06,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:06,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:10:06,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:06,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:06,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:06,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:06,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:10:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:06,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593152012] [2020-10-27 01:10:06,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:06,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:10:06,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792245066] [2020-10-27 01:10:06,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:10:06,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:10:06,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:10:06,745 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 8 states. [2020-10-27 01:10:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:07,013 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-10-27 01:10:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:10:07,014 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:10:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:07,015 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:10:07,016 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:10:07,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:10:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-27 01:10:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:10:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2020-10-27 01:10:07,037 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 20 [2020-10-27 01:10:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:07,038 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2020-10-27 01:10:07,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:10:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2020-10-27 01:10:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:10:07,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:07,044 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:07,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:10:07,045 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:07,046 INFO L82 PathProgramCache]: Analyzing trace with hash 100520868, now seen corresponding path program 1 times [2020-10-27 01:10:07,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:07,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429525528] [2020-10-27 01:10:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:07,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:07,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:07,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:07,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:08,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:08,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:08,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:10:08,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:10:08,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1461 [2020-10-27 01:10:08,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:10:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:10:08,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:08,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:08,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:08,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:08,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:08,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:10:08,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:08,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:08,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:08,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:08,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429525528] [2020-10-27 01:10:08,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:08,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:10:08,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369995102] [2020-10-27 01:10:08,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:10:08,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:08,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:10:08,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:10:08,701 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 7 states. [2020-10-27 01:10:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:08,889 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-27 01:10:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:10:08,889 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:10:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:08,890 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:10:08,890 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:10:08,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:10:08,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:10:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2020-10-27 01:10:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:10:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-27 01:10:08,897 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2020-10-27 01:10:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:08,897 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-27 01:10:08,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:10:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-27 01:10:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:10:08,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:08,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:08,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:10:08,899 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:08,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1030534352, now seen corresponding path program 1 times [2020-10-27 01:10:08,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:08,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250749707] [2020-10-27 01:10:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:08,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:09,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:09,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:10,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:10,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:10:10,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:10,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-27 01:10:10,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:10:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:10:10,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:10,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:10,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:10,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:10,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:10,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:10:10,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:10,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:10,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250749707] [2020-10-27 01:10:10,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:10,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:10:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818624012] [2020-10-27 01:10:10,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:10:10,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:10,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:10:10,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:10:10,166 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 8 states. [2020-10-27 01:10:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:10,482 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-27 01:10:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:10:10,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:10:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:10,484 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:10:10,484 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:10:10,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:10:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:10:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:10:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 01:10:10,491 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2020-10-27 01:10:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:10,491 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 01:10:10,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:10:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 01:10:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:10:10,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:10,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:10,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:10:10,493 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:10,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1489425582, now seen corresponding path program 1 times [2020-10-27 01:10:10,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:10,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824282888] [2020-10-27 01:10:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:10,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:10,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:10,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:10:10,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:10,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-27 01:10:10,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:10,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:10:10,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:10,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:10:10,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:11,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:11,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:11,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:11,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:11,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:11,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:10:11,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:11,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:11,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:11,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:11,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824282888] [2020-10-27 01:10:11,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:11,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:10:11,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570904131] [2020-10-27 01:10:11,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:10:11,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:11,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:10:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:10:11,155 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 9 states. [2020-10-27 01:10:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:11,724 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-10-27 01:10:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:10:11,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:10:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:11,726 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:10:11,726 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:10:11,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:10:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:10:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-27 01:10:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:10:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-27 01:10:11,740 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2020-10-27 01:10:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:11,742 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-27 01:10:11,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:10:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-27 01:10:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:10:11,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:11,745 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:11,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:10:11,745 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1487578540, now seen corresponding path program 1 times [2020-10-27 01:10:11,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:11,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712705745] [2020-10-27 01:10:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:11,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:12,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:12,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:10:12,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:12,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-27 01:10:12,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:10:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:10:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:12,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:12,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:12,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:12,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:12,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:12,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:12,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:12,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:12,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712705745] [2020-10-27 01:10:12,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:12,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:10:12,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548202348] [2020-10-27 01:10:12,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:10:12,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:10:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:10:12,669 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 9 states. [2020-10-27 01:10:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:13,096 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-27 01:10:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:10:13,097 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:10:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:13,098 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:10:13,098 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:10:13,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:10:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-27 01:10:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:10:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 01:10:13,106 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2020-10-27 01:10:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:13,107 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 01:10:13,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:10:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 01:10:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:10:13,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:13,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:13,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:10:13,108 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1288699790, now seen corresponding path program 2 times [2020-10-27 01:10:13,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:13,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073993964] [2020-10-27 01:10:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:13,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:13,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:13,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:13,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:10:13,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:13,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-27 01:10:13,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:10:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:10:13,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:13,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:13,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:13,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:13,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:13,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:13,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:13,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:10:13,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073993964] [2020-10-27 01:10:13,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:10:13,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:10:13,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998197359] [2020-10-27 01:10:13,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:10:13,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:13,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:10:13,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:10:13,707 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 6 states. [2020-10-27 01:10:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:13,860 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-27 01:10:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:10:13,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 01:10:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:13,862 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:10:13,862 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:10:13,863 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 [2020-10-27 01:10:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:10:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:10:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:10:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-27 01:10:13,868 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-10-27 01:10:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:13,869 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-27 01:10:13,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:10:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-27 01:10:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:10:13,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:13,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:13,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:10:13,870 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:13,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1242981375, now seen corresponding path program 1 times [2020-10-27 01:10:13,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:13,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756934474] [2020-10-27 01:10:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:13,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:14,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:15,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:15,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:10:15,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:15,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1260 [2020-10-27 01:10:15,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:15,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:10:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:10:15,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:10:15,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:15,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:15,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:15,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:15,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:15,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:10:15,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:15,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:15,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:10:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:15,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756934474] [2020-10-27 01:10:15,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:15,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:10:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363701477] [2020-10-27 01:10:15,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:10:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:10:15,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:10:15,543 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 9 states. [2020-10-27 01:10:15,724 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-27 01:10:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:15,953 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-10-27 01:10:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:10:15,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 01:10:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:15,955 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:10:15,955 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:10:15,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:10:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:10:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:10:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-27 01:10:15,967 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2020-10-27 01:10:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:15,967 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-27 01:10:15,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:10:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-27 01:10:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:10:15,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:15,969 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:15,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:10:15,970 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash 532025987, now seen corresponding path program 1 times [2020-10-27 01:10:15,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:15,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138143450] [2020-10-27 01:10:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:16,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:16,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:16,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:10:16,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:16,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 01:10:16,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:16,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:10:16,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:16,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:10:16,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:16,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:16,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:16,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:16,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:16,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:16,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:16,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:16,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:16,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:16,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:16,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138143450] [2020-10-27 01:10:16,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:16,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:10:16,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20670908] [2020-10-27 01:10:16,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:10:16,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:16,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:10:16,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:16,945 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 10 states. [2020-10-27 01:10:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:17,329 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-27 01:10:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:10:17,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:10:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:17,330 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:10:17,331 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:10:17,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:17,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:10:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-27 01:10:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:10:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-27 01:10:17,338 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 25 [2020-10-27 01:10:17,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:17,338 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-27 01:10:17,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:10:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-27 01:10:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:10:17,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:17,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:17,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:10:17,340 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:17,340 INFO L82 PathProgramCache]: Analyzing trace with hash 533873029, now seen corresponding path program 1 times [2020-10-27 01:10:17,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:17,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486977644] [2020-10-27 01:10:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:17,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:17,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:18,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:18,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:10:18,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:18,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-27 01:10:18,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:10:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:18,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:10:18,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:18,945 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-27 01:10:19,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:19,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:19,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:19,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:19,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:19,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:10:19,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:19,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:19,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:19,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:19,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:19,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486977644] [2020-10-27 01:10:19,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:19,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:10:19,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796419883] [2020-10-27 01:10:19,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:10:19,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:19,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:10:19,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:19,306 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 10 states. [2020-10-27 01:10:19,451 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-27 01:10:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:19,877 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-27 01:10:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:10:19,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:10:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:19,879 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:10:19,879 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:10:19,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:10:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-27 01:10:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:10:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-27 01:10:19,885 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 25 [2020-10-27 01:10:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:19,886 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-27 01:10:19,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:10:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-27 01:10:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:10:19,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:19,887 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:19,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:10:19,887 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash -984815937, now seen corresponding path program 2 times [2020-10-27 01:10:19,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:19,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047093212] [2020-10-27 01:10:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:19,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:20,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:20,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:10:20,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:20,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-10-27 01:10:20,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:20,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:10:20,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:20,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:10:20,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:21,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:21,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:21,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:21,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:21,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:21,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:21,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:21,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:21,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:21,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:21,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047093212] [2020-10-27 01:10:21,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:21,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:10:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074077444] [2020-10-27 01:10:21,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:10:21,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:21,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:10:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:21,133 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 10 states. [2020-10-27 01:10:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:21,643 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-27 01:10:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:10:21,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:10:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:21,645 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:10:21,645 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:10:21,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:10:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-27 01:10:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:10:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-27 01:10:21,653 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 25 [2020-10-27 01:10:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:21,653 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-27 01:10:21,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:10:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-27 01:10:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:10:21,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:21,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:21,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:10:21,655 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:21,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:21,655 INFO L82 PathProgramCache]: Analyzing trace with hash -982968895, now seen corresponding path program 2 times [2020-10-27 01:10:21,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:21,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115602566] [2020-10-27 01:10:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:21,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:21,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:22,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:22,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:22,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:10:22,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:22,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-27 01:10:22,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:10:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:10:22,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:23,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:23,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:23,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:23,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:23,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:10:23,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:23,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:10:23,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115602566] [2020-10-27 01:10:23,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:23,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:10:23,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062531755] [2020-10-27 01:10:23,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:10:23,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:10:23,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:10:23,188 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 7 states. [2020-10-27 01:10:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:23,426 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-27 01:10:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:10:23,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 01:10:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:23,427 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:10:23,427 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:10:23,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:10:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-27 01:10:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:10:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-10-27 01:10:23,435 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 25 [2020-10-27 01:10:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:23,435 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-10-27 01:10:23,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:10:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-10-27 01:10:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:10:23,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:23,436 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:23,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:10:23,436 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:23,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:23,437 INFO L82 PathProgramCache]: Analyzing trace with hash 940445199, now seen corresponding path program 3 times [2020-10-27 01:10:23,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:23,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084357707] [2020-10-27 01:10:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:24,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:24,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:10:24,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-27 01:10:24,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:10:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:10:24,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:24,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:24,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:24,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:24,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:24,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:24,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:24,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:24,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084357707] [2020-10-27 01:10:24,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:24,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:10:24,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117160840] [2020-10-27 01:10:24,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:10:24,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:10:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:10:24,739 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-10-27 01:10:24,902 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-27 01:10:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:25,527 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2020-10-27 01:10:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:10:25,529 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 01:10:25,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:25,530 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:10:25,530 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:10:25,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:10:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-27 01:10:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:10:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2020-10-27 01:10:25,547 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 27 [2020-10-27 01:10:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:25,547 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2020-10-27 01:10:25,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:10:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2020-10-27 01:10:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:10:25,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:25,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:25,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:10:25,548 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:25,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:25,549 INFO L82 PathProgramCache]: Analyzing trace with hash 942292241, now seen corresponding path program 2 times [2020-10-27 01:10:25,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:25,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745262502] [2020-10-27 01:10:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:25,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:27,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:27,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:10:27,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:27,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1656 [2020-10-27 01:10:27,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:27,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:10:27,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:27,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:10:27,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:27,646 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-27 01:10:27,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:27,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:27,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:27,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:27,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:27,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:27,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:27,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:27,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:27,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:27,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:27,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745262502] [2020-10-27 01:10:27,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:27,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:10:27,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022281573] [2020-10-27 01:10:27,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:10:27,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:10:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:10:27,759 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 11 states. [2020-10-27 01:10:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:28,436 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2020-10-27 01:10:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:10:28,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 01:10:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:28,438 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:10:28,438 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:10:28,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:10:28,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-10-27 01:10:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:10:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-27 01:10:28,457 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 27 [2020-10-27 01:10:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:28,457 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-27 01:10:28,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:10:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-27 01:10:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:10:28,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:28,459 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, 1] [2020-10-27 01:10:28,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:10:28,460 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash 344265968, now seen corresponding path program 3 times [2020-10-27 01:10:28,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:28,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088325210] [2020-10-27 01:10:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:28,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:30,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:30,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:10:30,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:30,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1808 [2020-10-27 01:10:30,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:10:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:10:30,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:30,510 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-10-27 01:10:30,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:30,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:30,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:30,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:30,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:30,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:10:30,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:30,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:10:30,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088325210] [2020-10-27 01:10:30,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:30,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:10:30,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607519220] [2020-10-27 01:10:30,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:10:30,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:30,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:10:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:30,794 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 10 states. [2020-10-27 01:10:30,958 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-27 01:10:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:31,267 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-27 01:10:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:10:31,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:10:31,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:31,268 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:10:31,268 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:10:31,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:10:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:10:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-10-27 01:10:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:10:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2020-10-27 01:10:31,278 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 28 [2020-10-27 01:10:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:31,278 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2020-10-27 01:10:31,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:10:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2020-10-27 01:10:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:10:31,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:31,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:31,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:10:31,280 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:31,280 INFO L82 PathProgramCache]: Analyzing trace with hash 807861630, now seen corresponding path program 3 times [2020-10-27 01:10:31,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:31,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036510270] [2020-10-27 01:10:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:31,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:32,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:32,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:10:32,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:32,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-10-27 01:10:32,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:32,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:32,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:32,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:10:32,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:32,626 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-27 01:10:32,744 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-27 01:10:32,872 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-27 01:10:33,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:33,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:33,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:33,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:33,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:33,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:10:33,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:33,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:33,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:33,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:33,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:33,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036510270] [2020-10-27 01:10:33,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:33,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:33,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322606791] [2020-10-27 01:10:33,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:33,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:33,280 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand 12 states. [2020-10-27 01:10:33,552 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-27 01:10:33,875 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-27 01:10:34,055 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-27 01:10:34,262 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-27 01:10:34,604 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-27 01:10:34,865 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 01:10:35,045 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-27 01:10:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:35,792 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-10-27 01:10:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:10:35,793 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:10:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:35,794 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:10:35,794 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:10:35,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:10:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:10:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2020-10-27 01:10:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:10:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-27 01:10:35,805 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-27 01:10:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:35,806 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-27 01:10:35,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-27 01:10:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:10:35,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:35,807 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:35,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:10:35,807 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash 809708672, now seen corresponding path program 4 times [2020-10-27 01:10:35,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:35,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616116466] [2020-10-27 01:10:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:37,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:37,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:10:37,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:37,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1726 [2020-10-27 01:10:37,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:37,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:37,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:37,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:10:37,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:37,887 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2020-10-27 01:10:37,998 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-27 01:10:38,131 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-27 01:10:38,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:38,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:38,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:38,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:38,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:38,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:38,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:38,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:38,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:38,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:38,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:38,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616116466] [2020-10-27 01:10:38,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:38,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:38,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706300602] [2020-10-27 01:10:38,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:38,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:38,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:38,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:38,575 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 12 states. [2020-10-27 01:10:38,863 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-27 01:10:39,331 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-27 01:10:39,511 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 01:10:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:40,229 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-10-27 01:10:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:10:40,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:10:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:40,231 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:10:40,231 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:10:40,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:10:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:10:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2020-10-27 01:10:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:10:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-27 01:10:40,243 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-27 01:10:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:40,243 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-27 01:10:40,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-27 01:10:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:10:40,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:40,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:40,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:10:40,244 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1712098304, now seen corresponding path program 4 times [2020-10-27 01:10:40,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:40,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700884890] [2020-10-27 01:10:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:40,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:40,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:42,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:42,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:10:42,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:42,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2141 [2020-10-27 01:10:42,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:42,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:42,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:42,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:10:42,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:43,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:43,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:43,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:43,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:43,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:43,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:43,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:43,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:43,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:43,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:43,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:43,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700884890] [2020-10-27 01:10:43,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:43,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:43,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92117117] [2020-10-27 01:10:43,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:43,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:43,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:43,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:43,036 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 12 states. [2020-10-27 01:10:43,326 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-27 01:10:43,766 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-27 01:10:43,952 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-27 01:10:45,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:45,017 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-27 01:10:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:10:45,018 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:10:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:45,019 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:10:45,019 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:10:45,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:10:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:10:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2020-10-27 01:10:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:10:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-27 01:10:45,031 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-27 01:10:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:45,032 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-27 01:10:45,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-27 01:10:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:10:45,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:45,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:45,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:10:45,033 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1710251262, now seen corresponding path program 5 times [2020-10-27 01:10:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:45,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506694703] [2020-10-27 01:10:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:45,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:45,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:45,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:46,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:46,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:47,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:47,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:10:47,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:10:47,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2352 [2020-10-27 01:10:47,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:47,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:47,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:47,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:10:47,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:47,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:47,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:47,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:47,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:47,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:47,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:47,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:47,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:47,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:47,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:47,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:47,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506694703] [2020-10-27 01:10:47,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:47,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:47,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106003599] [2020-10-27 01:10:47,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:47,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:47,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:47,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:47,903 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 12 states. [2020-10-27 01:10:48,118 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-27 01:10:48,397 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-27 01:10:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:48,914 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-10-27 01:10:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:10:48,916 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:10:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:48,918 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:10:48,918 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:10:48,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:10:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:10:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2020-10-27 01:10:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:10:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-27 01:10:48,933 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-27 01:10:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:48,934 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-27 01:10:48,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-27 01:10:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:10:48,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:48,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:48,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:10:48,935 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:48,935 INFO L82 PathProgramCache]: Analyzing trace with hash -176531086, now seen corresponding path program 4 times [2020-10-27 01:10:48,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:48,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550779879] [2020-10-27 01:10:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:49,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:50,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:51,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:51,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:10:51,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:51,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2850 [2020-10-27 01:10:51,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:10:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:10:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:52,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:52,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:52,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:52,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:52,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:52,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:52,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:52,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550779879] [2020-10-27 01:10:52,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:52,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:52,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100808047] [2020-10-27 01:10:52,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:52,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:52,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:52,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:52,397 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 12 states. [2020-10-27 01:10:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:53,182 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2020-10-27 01:10:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:10:53,184 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:10:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:53,185 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:10:53,185 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:10:53,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:10:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:10:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2020-10-27 01:10:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:10:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2020-10-27 01:10:53,197 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 32 [2020-10-27 01:10:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:53,197 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2020-10-27 01:10:53,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2020-10-27 01:10:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:10:53,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:53,198 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:53,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:10:53,198 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:53,199 INFO L82 PathProgramCache]: Analyzing trace with hash 83481394, now seen corresponding path program 3 times [2020-10-27 01:10:53,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:53,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077229805] [2020-10-27 01:10:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:53,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:53,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:54,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:55,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:55,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:10:55,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:55,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2489 [2020-10-27 01:10:55,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:10:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:10:55,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:55,993 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 01:10:56,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:56,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:56,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:56,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:56,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:56,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:56,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:56,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:10:56,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077229805] [2020-10-27 01:10:56,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:56,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:10:56,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299689870] [2020-10-27 01:10:56,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:10:56,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:56,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:10:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:56,382 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand 10 states. [2020-10-27 01:10:56,541 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 01:10:56,840 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-27 01:10:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:57,043 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-10-27 01:10:57,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:10:57,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 01:10:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:57,045 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:10:57,045 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:10:57,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:10:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:10:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 01:10:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:10:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2020-10-27 01:10:57,056 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 32 [2020-10-27 01:10:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:57,056 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2020-10-27 01:10:57,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:10:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2020-10-27 01:10:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:10:57,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:57,057 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:57,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:10:57,057 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash 534156531, now seen corresponding path program 5 times [2020-10-27 01:10:57,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:57,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934202088] [2020-10-27 01:10:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:57,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:58,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:58,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:10:58,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:58,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1516 [2020-10-27 01:10:58,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:58,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:10:58,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:58,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:10:58,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:59,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:59,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:59,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:59,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:59,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:59,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:59,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:59,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:59,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:59,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:59,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934202088] [2020-10-27 01:10:59,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:59,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:10:59,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689084065] [2020-10-27 01:10:59,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:10:59,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:59,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:10:59,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:10:59,345 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 13 states. [2020-10-27 01:10:59,775 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 84 [2020-10-27 01:11:00,379 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 82 [2020-10-27 01:11:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:01,091 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-27 01:11:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:11:01,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:11:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:01,093 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:11:01,093 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:11:01,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:11:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:11:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-27 01:11:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:11:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-27 01:11:01,106 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 33 [2020-10-27 01:11:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:01,106 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-27 01:11:01,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:11:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-27 01:11:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:11:01,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:01,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:01,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:11:01,107 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash 536003573, now seen corresponding path program 6 times [2020-10-27 01:11:01,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:01,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002183512] [2020-10-27 01:11:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:01,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:01,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:03,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:03,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:11:03,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:11:03,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1996 [2020-10-27 01:11:03,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:03,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:11:03,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:03,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:11:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:03,356 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-27 01:11:03,480 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-27 01:11:03,603 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 01:11:03,752 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-27 01:11:04,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:04,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:04,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:04,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:04,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:04,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:04,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:04,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:04,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:04,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:04,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:04,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002183512] [2020-10-27 01:11:04,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:04,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:11:04,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034209324] [2020-10-27 01:11:04,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:11:04,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:04,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:11:04,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:11:04,106 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 13 states. [2020-10-27 01:11:04,433 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-27 01:11:04,917 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2020-10-27 01:11:05,171 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 01:11:05,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:05,920 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2020-10-27 01:11:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:11:05,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:11:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:05,922 INFO L225 Difference]: With dead ends: 109 [2020-10-27 01:11:05,922 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:11:05,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:11:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:11:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-10-27 01:11:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:11:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-27 01:11:05,932 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 33 [2020-10-27 01:11:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:05,932 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-27 01:11:05,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:11:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-27 01:11:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:11:05,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:05,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:05,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:11:05,934 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1985803403, now seen corresponding path program 6 times [2020-10-27 01:11:05,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:05,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216415049] [2020-10-27 01:11:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:05,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:06,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:07,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:07,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:11:07,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:11:07,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-10-27 01:11:07,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:07,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:11:07,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:07,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:11:07,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:07,633 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-27 01:11:07,756 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-27 01:11:08,015 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-27 01:11:08,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:08,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:08,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:08,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:08,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:08,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:11:08,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:08,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:08,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:08,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:08,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:08,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216415049] [2020-10-27 01:11:08,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:08,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:11:08,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404988272] [2020-10-27 01:11:08,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:11:08,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:08,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:11:08,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:11:08,411 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 13 states. [2020-10-27 01:11:08,847 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 84 [2020-10-27 01:11:09,821 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2020-10-27 01:11:10,034 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-27 01:11:10,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:10,875 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-27 01:11:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:11:10,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:11:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:10,877 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:11:10,878 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:11:10,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:11:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:11:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-27 01:11:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:11:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-27 01:11:10,889 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 33 [2020-10-27 01:11:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:10,890 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-27 01:11:10,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:11:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-27 01:11:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:11:10,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:10,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:10,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:11:10,891 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1983956361, now seen corresponding path program 7 times [2020-10-27 01:11:10,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:10,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180749402] [2020-10-27 01:11:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:10,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:11,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:11,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:12,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:12,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:11:12,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:11:12,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1934 [2020-10-27 01:11:12,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:11:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:12,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:11:12,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:13,113 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 01:11:13,292 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-27 01:11:13,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:13,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:13,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:13,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:13,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:13,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:13,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:13,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:13,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:13,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:13,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:13,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180749402] [2020-10-27 01:11:13,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:13,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:11:13,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115143537] [2020-10-27 01:11:13,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:11:13,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:11:13,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:11:13,856 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 13 states. [2020-10-27 01:11:14,140 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 76 [2020-10-27 01:11:14,569 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2020-10-27 01:11:14,736 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 01:11:14,885 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-27 01:11:15,379 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 01:11:15,620 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-27 01:11:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:16,037 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2020-10-27 01:11:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:11:16,038 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:11:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:16,039 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:11:16,039 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:11:16,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:11:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:11:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2020-10-27 01:11:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:11:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-10-27 01:11:16,052 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 33 [2020-10-27 01:11:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:16,052 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-10-27 01:11:16,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:11:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-10-27 01:11:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:11:16,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:16,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:16,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:11:16,054 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash 794169011, now seen corresponding path program 8 times [2020-10-27 01:11:16,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:16,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890228604] [2020-10-27 01:11:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:16,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:16,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:16,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:17,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:18,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:18,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:11:18,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:11:18,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2125 [2020-10-27 01:11:18,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:11:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:11:18,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:18,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:18,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:18,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:18,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:18,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:18,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:11:18,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:18,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:18,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:18,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:18,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:11:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:11:18,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890228604] [2020-10-27 01:11:18,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:18,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:11:18,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478750619] [2020-10-27 01:11:18,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:11:18,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:18,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:11:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:11:18,568 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 8 states. [2020-10-27 01:11:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:18,853 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2020-10-27 01:11:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:11:18,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 01:11:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:18,857 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:11:18,858 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 01:11:18,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:11:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 01:11:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-27 01:11:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:11:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-27 01:11:18,883 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 33 [2020-10-27 01:11:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:18,883 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-27 01:11:18,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:11:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-27 01:11:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:11:18,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:18,885 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:18,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:11:18,885 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:18,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash -536299677, now seen corresponding path program 7 times [2020-10-27 01:11:18,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:18,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600659701] [2020-10-27 01:11:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:19,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:20,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:20,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:11:20,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:20,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-27 01:11:20,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:11:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:11:20,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:20,664 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-27 01:11:20,862 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-27 01:11:20,999 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-27 01:11:21,147 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 01:11:21,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:21,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:21,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:21,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:21,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:21,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:21,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:21,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:21,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:21,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600659701] [2020-10-27 01:11:21,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:21,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:11:21,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908804729] [2020-10-27 01:11:21,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:11:21,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:21,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:11:21,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:11:21,623 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 14 states. [2020-10-27 01:11:21,936 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 71 [2020-10-27 01:11:22,300 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-27 01:11:22,480 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-27 01:11:22,689 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-27 01:11:22,926 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2020-10-27 01:11:23,227 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 51 [2020-10-27 01:11:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:23,752 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2020-10-27 01:11:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:11:23,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:11:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:23,754 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:11:23,754 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:11:23,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:11:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:11:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-27 01:11:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:11:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-27 01:11:23,765 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 35 [2020-10-27 01:11:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:23,765 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-27 01:11:23,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:11:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-27 01:11:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:11:23,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:23,766 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:23,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:11:23,766 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:23,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:23,767 INFO L82 PathProgramCache]: Analyzing trace with hash -534452635, now seen corresponding path program 9 times [2020-10-27 01:11:23,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:23,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179947378] [2020-10-27 01:11:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:23,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:24,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:25,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:25,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:11:25,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:11:25,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-27 01:11:25,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:11:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:11:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:26,054 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-27 01:11:26,217 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-27 01:11:26,388 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-27 01:11:26,536 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-27 01:11:27,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:27,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:27,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:27,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:27,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:27,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:27,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:27,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:27,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:27,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:27,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:27,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179947378] [2020-10-27 01:11:27,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:27,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:11:27,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140635764] [2020-10-27 01:11:27,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:11:27,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:27,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:11:27,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:11:27,056 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 14 states. [2020-10-27 01:11:27,357 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 68 [2020-10-27 01:11:27,780 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-27 01:11:27,993 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-27 01:11:28,181 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2020-10-27 01:11:28,460 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-27 01:11:28,611 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-27 01:11:28,893 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-27 01:11:29,262 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-27 01:11:29,414 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-27 01:11:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:29,720 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2020-10-27 01:11:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:11:29,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:11:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:29,722 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:11:29,722 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:11:29,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:11:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:11:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-27 01:11:29,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:11:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-27 01:11:29,740 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 35 [2020-10-27 01:11:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:29,740 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-27 01:11:29,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:11:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-27 01:11:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:11:29,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:29,741 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:29,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:11:29,742 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:29,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1238707685, now seen corresponding path program 8 times [2020-10-27 01:11:29,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:29,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683290334] [2020-10-27 01:11:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:29,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:31,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:31,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:11:31,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:31,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1243 [2020-10-27 01:11:31,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:31,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:11:31,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:31,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:11:31,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:31,394 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-27 01:11:31,555 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 01:11:31,688 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 01:11:32,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:32,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:32,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:32,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:32,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:11:32,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:32,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:32,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:32,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:32,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:32,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683290334] [2020-10-27 01:11:32,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:32,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:11:32,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891995867] [2020-10-27 01:11:32,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:11:32,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:11:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:11:32,226 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 14 states. [2020-10-27 01:11:32,527 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 68 [2020-10-27 01:11:32,871 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-27 01:11:33,092 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-27 01:11:33,347 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-27 01:11:33,536 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-27 01:11:33,900 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-27 01:11:34,042 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-27 01:11:34,262 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-27 01:11:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:34,809 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-27 01:11:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:11:34,810 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:11:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:34,811 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:11:34,811 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:11:34,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:11:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:11:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-27 01:11:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:11:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-27 01:11:34,822 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 35 [2020-10-27 01:11:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:34,822 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-27 01:11:34,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:11:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-27 01:11:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:11:34,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:34,823 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:34,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:11:34,823 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:34,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1240554727, now seen corresponding path program 10 times [2020-10-27 01:11:34,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:34,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233980066] [2020-10-27 01:11:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:34,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:35,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:37,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:37,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:11:37,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:11:37,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2868 [2020-10-27 01:11:37,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:11:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:11:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:38,127 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-27 01:11:38,888 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-27 01:11:39,468 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-27 01:11:39,976 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-27 01:11:40,276 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-27 01:11:40,521 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 01:11:41,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:41,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:41,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:41,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:41,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:41,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:41,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:41,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:41,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:41,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:41,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233980066] [2020-10-27 01:11:41,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:41,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:11:41,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492380528] [2020-10-27 01:11:41,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:11:41,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:11:41,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:11:41,053 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 15 states. [2020-10-27 01:11:41,533 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 67 [2020-10-27 01:11:42,100 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2020-10-27 01:11:42,567 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 69 [2020-10-27 01:11:42,916 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 63 [2020-10-27 01:11:43,259 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 64 [2020-10-27 01:11:43,767 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 74 [2020-10-27 01:11:44,235 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-10-27 01:11:44,575 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 65 [2020-10-27 01:11:44,954 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-27 01:11:45,385 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 50 [2020-10-27 01:11:45,779 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-10-27 01:11:46,229 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 51 [2020-10-27 01:11:46,649 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-10-27 01:11:47,021 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-27 01:11:47,485 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 52 [2020-10-27 01:11:47,836 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-27 01:11:48,188 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-27 01:11:48,508 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-27 01:11:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:49,112 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-10-27 01:11:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:11:49,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 01:11:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:49,114 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:11:49,114 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:11:49,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:11:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:11:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-27 01:11:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:11:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-27 01:11:49,124 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 35 [2020-10-27 01:11:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:49,124 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-27 01:11:49,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:11:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-27 01:11:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:11:49,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:49,125 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:49,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:11:49,125 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:49,126 INFO L82 PathProgramCache]: Analyzing trace with hash -276287197, now seen corresponding path program 11 times [2020-10-27 01:11:49,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:49,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399782257] [2020-10-27 01:11:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:49,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:49,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:52,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:52,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:11:52,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:11:52,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3209 [2020-10-27 01:11:52,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:11:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:11:52,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:52,680 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-10-27 01:11:52,847 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-27 01:11:53,059 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-27 01:11:53,262 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-27 01:11:53,416 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 01:11:53,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:53,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:53,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:53,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:53,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:53,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:53,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:53,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399782257] [2020-10-27 01:11:53,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:53,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:11:53,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614831664] [2020-10-27 01:11:53,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:11:53,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:11:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:11:53,823 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 14 states. [2020-10-27 01:11:54,211 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 67 [2020-10-27 01:11:54,667 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2020-10-27 01:11:54,960 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-27 01:11:55,154 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-27 01:11:55,350 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 01:11:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:55,913 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-10-27 01:11:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:11:55,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:11:55,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:55,915 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:11:55,915 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:11:55,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:11:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:11:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-27 01:11:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:11:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-27 01:11:55,923 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 35 [2020-10-27 01:11:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:55,924 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-27 01:11:55,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:11:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-27 01:11:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:11:55,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:55,924 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:55,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:11:55,925 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1498720165, now seen corresponding path program 12 times [2020-10-27 01:11:55,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:55,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428532293] [2020-10-27 01:11:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:56,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:56,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:56,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:57,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:57,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:58,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:00,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:00,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:12:00,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:12:00,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 01:12:00,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:00,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:12:00,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:00,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:12:00,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:01,267 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 01:12:01,431 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-27 01:12:01,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:01,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:01,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:01,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:01,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:12:01,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:01,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:01,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:12:01,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428532293] [2020-10-27 01:12:01,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:01,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:12:01,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057742295] [2020-10-27 01:12:01,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:12:01,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:01,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:12:01,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:12:01,682 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 11 states. [2020-10-27 01:12:01,962 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2020-10-27 01:12:02,356 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-27 01:12:02,511 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-27 01:12:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:02,689 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-27 01:12:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:12:02,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:12:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:02,690 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:12:02,690 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:12:02,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:12:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:12:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:12:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:12:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-27 01:12:02,698 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2020-10-27 01:12:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:02,698 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-27 01:12:02,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:12:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-27 01:12:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:12:02,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:02,699 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:02,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:12:02,699 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:02,700 INFO L82 PathProgramCache]: Analyzing trace with hash 739796126, now seen corresponding path program 9 times [2020-10-27 01:12:02,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:02,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807207065] [2020-10-27 01:12:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:02,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:03,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:07,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:07,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:12:07,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:12:07,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4849 [2020-10-27 01:12:07,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:07,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:12:07,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:07,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:12:07,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:07,868 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-27 01:12:08,001 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 01:12:08,135 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-27 01:12:08,261 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-27 01:12:08,414 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-27 01:12:08,548 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-27 01:12:08,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:09,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:09,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:09,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:09,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:09,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:09,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807207065] [2020-10-27 01:12:09,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:09,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:12:09,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557403987] [2020-10-27 01:12:09,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:12:09,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:09,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:12:09,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:12:09,029 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 15 states. [2020-10-27 01:12:09,373 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2020-10-27 01:12:09,868 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-27 01:12:10,184 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-27 01:12:10,353 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-27 01:12:10,535 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-27 01:12:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:11,022 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-27 01:12:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:12:11,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-27 01:12:11,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:11,023 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:12:11,024 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:12:11,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:12:11,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:12:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:12:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:12:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 01:12:11,033 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 40 [2020-10-27 01:12:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:11,033 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 01:12:11,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:12:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 01:12:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:12:11,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:11,034 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:11,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:12:11,035 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:11,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1780163808, now seen corresponding path program 10 times [2020-10-27 01:12:11,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:11,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360044294] [2020-10-27 01:12:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:12,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:12,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:12:12,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:12,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1830 [2020-10-27 01:12:12,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:12:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:12:12,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:13,174 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-27 01:12:13,296 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-27 01:12:13,471 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-27 01:12:13,633 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-27 01:12:13,825 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-27 01:12:13,974 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 01:12:14,140 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-27 01:12:14,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:14,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:14,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:14,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:14,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:14,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:14,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:14,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360044294] [2020-10-27 01:12:14,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:14,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:12:14,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637454107] [2020-10-27 01:12:14,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:12:14,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:12:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:12:14,663 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 16 states. [2020-10-27 01:12:15,018 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-10-27 01:12:15,513 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-27 01:12:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:16,371 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-27 01:12:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:12:16,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 01:12:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:16,373 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:12:16,373 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:12:16,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:12:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:12:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-27 01:12:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:12:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-27 01:12:16,384 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 40 [2020-10-27 01:12:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:16,384 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-27 01:12:16,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:12:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-27 01:12:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:12:16,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:16,385 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:16,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:12:16,385 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1778316766, now seen corresponding path program 13 times [2020-10-27 01:12:16,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:16,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255026657] [2020-10-27 01:12:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:16,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:17,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:19,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:19,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:12:19,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:19,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3228 [2020-10-27 01:12:19,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:12:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:12:19,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:19,971 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-27 01:12:20,136 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-27 01:12:20,336 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 01:12:20,485 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-27 01:12:20,647 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 01:12:20,908 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-27 01:12:21,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:21,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:21,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:21,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:21,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:21,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:21,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:21,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255026657] [2020-10-27 01:12:21,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:21,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:12:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186605982] [2020-10-27 01:12:21,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:12:21,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:12:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:12:21,355 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 16 states. [2020-10-27 01:12:21,712 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 67 [2020-10-27 01:12:22,109 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-10-27 01:12:22,367 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-27 01:12:22,533 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-27 01:12:22,688 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-27 01:12:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:23,251 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-27 01:12:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:12:23,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 01:12:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:23,253 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:12:23,253 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:12:23,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:12:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:12:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-27 01:12:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:12:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 01:12:23,261 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 40 [2020-10-27 01:12:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:23,261 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 01:12:23,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:12:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 01:12:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:12:23,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:23,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:23,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:12:23,262 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:23,263 INFO L82 PathProgramCache]: Analyzing trace with hash 997961564, now seen corresponding path program 11 times [2020-10-27 01:12:23,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:23,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124702300] [2020-10-27 01:12:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:23,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:25,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:25,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:12:25,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:25,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1741 [2020-10-27 01:12:25,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:25,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:12:25,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:12:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:25,320 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-27 01:12:25,474 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-27 01:12:25,686 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-27 01:12:25,896 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-27 01:12:26,063 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-27 01:12:26,214 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-27 01:12:26,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:26,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:26,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:26,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:26,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:26,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:26,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:26,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:26,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:26,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:26,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:26,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124702300] [2020-10-27 01:12:26,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:26,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:12:26,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114099523] [2020-10-27 01:12:26,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:12:26,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:26,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:12:26,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:12:26,805 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 16 states. [2020-10-27 01:12:27,133 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 65 [2020-10-27 01:12:27,495 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-27 01:12:27,772 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-27 01:12:27,957 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 01:12:28,152 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-27 01:12:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:29,007 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-27 01:12:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:12:29,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 01:12:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:29,009 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:12:29,010 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:12:29,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:12:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:12:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-27 01:12:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:12:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-27 01:12:29,017 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 40 [2020-10-27 01:12:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:29,017 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-27 01:12:29,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:12:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-27 01:12:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:12:29,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:29,018 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:29,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:12:29,018 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:29,019 INFO L82 PathProgramCache]: Analyzing trace with hash 999808606, now seen corresponding path program 14 times [2020-10-27 01:12:29,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:29,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682531097] [2020-10-27 01:12:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:29,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:30,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:32,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:33,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:34,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:34,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:12:34,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:12:34,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 01:12:34,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:12:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:12:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:34,457 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-27 01:12:34,618 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-27 01:12:34,906 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-27 01:12:35,105 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 01:12:35,327 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-27 01:12:35,521 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-27 01:12:35,678 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-27 01:12:35,970 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-27 01:12:36,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:36,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:36,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:36,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:36,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:36,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:36,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:36,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:36,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:36,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682531097] [2020-10-27 01:12:36,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:36,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:12:36,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921603617] [2020-10-27 01:12:36,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:12:36,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:36,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:12:36,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:12:36,449 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 17 states. [2020-10-27 01:12:36,809 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 60 [2020-10-27 01:12:37,186 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-27 01:12:37,487 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 68 [2020-10-27 01:12:37,668 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-27 01:12:37,867 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-27 01:12:38,079 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-27 01:12:38,460 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 01:12:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:38,731 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-10-27 01:12:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:12:38,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 01:12:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:38,733 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:12:38,733 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:12:38,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:12:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:12:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-27 01:12:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:12:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-27 01:12:38,740 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 40 [2020-10-27 01:12:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:38,741 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-27 01:12:38,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:12:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-27 01:12:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:12:38,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:38,741 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:38,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:12:38,742 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1520151328, now seen corresponding path program 15 times [2020-10-27 01:12:38,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:38,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915527055] [2020-10-27 01:12:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:38,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:39,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:41,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:41,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:42,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:42,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:43,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:43,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:43,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:12:43,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:12:43,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 01:12:43,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:12:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:12:43,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:44,078 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-27 01:12:44,207 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 01:12:44,359 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 01:12:44,984 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-27 01:12:45,278 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-10-27 01:12:45,452 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-27 01:12:45,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:45,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:45,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:45,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:45,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:45,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:45,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:45,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:45,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:45,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:45,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915527055] [2020-10-27 01:12:45,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:45,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:12:45,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631319004] [2020-10-27 01:12:45,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:12:45,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:45,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:12:45,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:12:45,778 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 17 states. [2020-10-27 01:12:46,173 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 67 [2020-10-27 01:12:46,563 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-10-27 01:12:46,974 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2020-10-27 01:12:47,288 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-27 01:12:47,497 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-27 01:12:47,734 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-27 01:12:47,955 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-27 01:12:48,189 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-27 01:12:48,412 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 01:12:48,620 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-27 01:12:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:49,276 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-27 01:12:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:12:49,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 01:12:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:49,278 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:12:49,278 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:12:49,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:12:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:12:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-27 01:12:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:12:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-27 01:12:49,287 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 40 [2020-10-27 01:12:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:49,287 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-27 01:12:49,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:12:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-27 01:12:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:12:49,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:49,288 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:49,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:12:49,288 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1143075071, now seen corresponding path program 12 times [2020-10-27 01:12:49,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:49,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709989567] [2020-10-27 01:12:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:49,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:50,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:54,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:54,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:12:54,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:54,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:12:54,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:12:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:54,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:12:54,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:54,717 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-27 01:12:54,881 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-27 01:12:55,080 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 47 [2020-10-27 01:12:55,267 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2020-10-27 01:12:55,433 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-27 01:12:55,587 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-27 01:12:55,796 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-27 01:12:55,946 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-27 01:12:56,101 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-27 01:12:56,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:56,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:56,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:56,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:56,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:56,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:56,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:56,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:56,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:56,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:56,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:56,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709989567] [2020-10-27 01:12:56,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:56,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:12:56,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057414860] [2020-10-27 01:12:56,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:12:56,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:12:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:12:56,486 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 17 states. [2020-10-27 01:12:56,961 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 78 [2020-10-27 01:12:57,589 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 85 [2020-10-27 01:12:57,979 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 01:12:58,209 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-27 01:12:58,446 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-27 01:12:58,744 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-27 01:12:58,938 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-27 01:12:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:59,228 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-27 01:12:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:12:59,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-27 01:12:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:59,231 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:12:59,231 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:12:59,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:12:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:12:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 01:12:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:12:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-27 01:12:59,240 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 45 [2020-10-27 01:12:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:59,240 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-27 01:12:59,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:12:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-27 01:12:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:12:59,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:59,241 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:59,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:12:59,241 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:59,242 INFO L82 PathProgramCache]: Analyzing trace with hash 631932291, now seen corresponding path program 13 times [2020-10-27 01:12:59,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:59,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951977140] [2020-10-27 01:12:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:02,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:02,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:13:02,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:13:02,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3283 [2020-10-27 01:13:02,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:13:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:13:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:13:02,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:02,882 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-27 01:13:03,035 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-27 01:13:03,229 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-27 01:13:03,409 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-27 01:13:03,735 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-27 01:13:04,024 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-27 01:13:04,299 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-27 01:13:04,525 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-27 01:13:04,750 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-27 01:13:05,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:13:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:05,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:05,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:05,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:13:05,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:13:05,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:13:05,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:05,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:13:05,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:13:05,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:13:05,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:13:05,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951977140] [2020-10-27 01:13:05,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:13:05,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:13:05,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446788829] [2020-10-27 01:13:05,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:13:05,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:13:05,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:13:05,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:13:05,390 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 18 states. [2020-10-27 01:13:05,900 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 60 [2020-10-27 01:13:06,398 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-10-27 01:13:07,154 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-27 01:13:07,347 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-27 01:13:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:13:08,106 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-27 01:13:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:13:08,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 01:13:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:13:08,108 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:13:08,108 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:13:08,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:13:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:13:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-27 01:13:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:13:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-27 01:13:08,118 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 45 [2020-10-27 01:13:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:13:08,118 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-27 01:13:08,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:13:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-27 01:13:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:13:08,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:13:08,119 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:13:08,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:13:08,119 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:13:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:13:08,119 INFO L82 PathProgramCache]: Analyzing trace with hash 633779333, now seen corresponding path program 16 times [2020-10-27 01:13:08,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:13:08,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54296110] [2020-10-27 01:13:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:13:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:08,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:09,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:13,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:13,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:13:13,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:13:13,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 01:13:13,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:13,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:13:13,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:13:13,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:13:13,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:13,581 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-27 01:13:13,714 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-27 01:13:13,962 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-27 01:13:14,177 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 01:13:14,358 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-27 01:13:14,508 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 01:13:14,706 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-27 01:13:14,873 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-27 01:13:15,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:13:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:15,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:15,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:15,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:13:15,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:13:15,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:13:15,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:15,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:13:15,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:13:15,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:13:15,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:13:15,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54296110] [2020-10-27 01:13:15,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:13:15,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:13:15,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809943136] [2020-10-27 01:13:15,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:13:15,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:13:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:13:15,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:13:15,596 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 18 states. [2020-10-27 01:13:16,006 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 63 [2020-10-27 01:13:16,522 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 70 [2020-10-27 01:13:16,865 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-27 01:13:17,093 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2020-10-27 01:13:17,311 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-27 01:13:17,709 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-27 01:13:17,892 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 01:13:18,084 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 01:13:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:13:18,660 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-27 01:13:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:13:18,661 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 01:13:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:13:18,662 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:13:18,662 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:13:18,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:13:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:13:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-27 01:13:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:13:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-27 01:13:18,671 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 45 [2020-10-27 01:13:18,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:13:18,671 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-27 01:13:18,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:13:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-27 01:13:18,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:13:18,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:13:18,672 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:13:18,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:13:18,672 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:13:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:13:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1305378885, now seen corresponding path program 14 times [2020-10-27 01:13:18,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:13:18,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750410101] [2020-10-27 01:13:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:13:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:18,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:20,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:23,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:24,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:24,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:13:24,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:13:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5843 [2020-10-27 01:13:24,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:13:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:13:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:13:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:25,052 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-27 01:13:25,251 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-27 01:13:25,499 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-27 01:13:25,683 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-27 01:13:25,867 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-27 01:13:26,030 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-27 01:13:26,210 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-27 01:13:26,358 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-27 01:13:26,518 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-27 01:13:27,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:13:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:27,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:27,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:27,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:13:27,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:13:27,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:13:27,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:27,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:13:27,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:13:27,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:13:27,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:13:27,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750410101] [2020-10-27 01:13:27,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:13:27,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:13:27,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639863347] [2020-10-27 01:13:27,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:13:27,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:13:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:13:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:13:27,121 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 18 states. [2020-10-27 01:13:27,576 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 78 [2020-10-27 01:13:28,185 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-27 01:13:28,491 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-27 01:13:28,683 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-27 01:13:28,878 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-27 01:13:29,120 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-27 01:13:29,308 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-27 01:13:29,498 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 01:13:29,724 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-27 01:13:29,935 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-27 01:13:30,143 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-27 01:13:30,438 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 01:13:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:13:31,046 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-27 01:13:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:13:31,051 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 01:13:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:13:31,051 INFO L225 Difference]: With dead ends: 83 [2020-10-27 01:13:31,051 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:13:31,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:13:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:13:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-10-27 01:13:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:13:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-10-27 01:13:31,061 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 45 [2020-10-27 01:13:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:13:31,061 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-10-27 01:13:31,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:13:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-10-27 01:13:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:13:31,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:13:31,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:13:31,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:13:31,062 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:13:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:13:31,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1307225927, now seen corresponding path program 17 times [2020-10-27 01:13:31,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:13:31,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66673636] [2020-10-27 01:13:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:13:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:31,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking...