/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-data/packet_filter.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:14:17,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:14:17,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:14:17,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:14:17,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:14:17,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:14:17,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:14:17,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:14:17,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:14:17,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:14:17,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:14:17,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:14:17,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:14:17,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:14:17,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:14:17,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:14:17,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:14:17,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:14:17,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:14:17,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:14:17,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:14:17,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:14:17,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:14:17,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:14:17,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:14:17,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:14:17,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:14:17,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:14:17,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:14:17,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:14:17,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:14:17,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:14:17,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:14:17,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:14:17,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:14:17,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:14:17,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:14:17,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:14:17,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:14:17,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:14:17,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:14:17,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:14:17,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:14:17,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:14:17,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:14:17,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:14:17,581 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:14:17,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:14:17,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:14:17,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:14:17,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:14:17,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:14:17,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:14:17,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:14:17,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:14:17,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:14:17,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:14:17,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:14:17,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:14:17,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:14:17,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:14:17,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:14:17,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:14:17,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:14:17,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:14:17,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:14:17,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:14:17,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:14:17,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:14:17,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:14:17,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:14:17,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:14:18,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:14:18,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:14:18,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:14:18,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:14:18,115 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:14:18,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/packet_filter.i [2020-10-29 09:14:18,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a557d049/b9b22051802f4e8ba25bceb11d84e0e7/FLAG2b815cb3c [2020-10-29 09:14:18,972 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:14:18,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/packet_filter.i [2020-10-29 09:14:18,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a557d049/b9b22051802f4e8ba25bceb11d84e0e7/FLAG2b815cb3c [2020-10-29 09:14:19,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a557d049/b9b22051802f4e8ba25bceb11d84e0e7 [2020-10-29 09:14:19,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:14:19,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:14:19,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:14:19,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:14:19,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:14:19,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:19,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49856691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19, skipping insertion in model container [2020-10-29 09:14:19,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:19,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:14:19,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:14:19,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:14:19,760 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:14:19,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:14:19,927 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:14:19,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19 WrapperNode [2020-10-29 09:14:19,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:14:19,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:14:19,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:14:19,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:14:19,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:19,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:19,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:19,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:19,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:20,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:20,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (1/1) ... [2020-10-29 09:14:20,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:14:20,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:14:20,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:14:20,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:14:20,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:14:20,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:14:20,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:14:20,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:14:20,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:14:20,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:14:20,133 INFO L138 BoogieDeclarations]: Found implementation of procedure receive [2020-10-29 09:14:20,133 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2020-10-29 09:14:20,133 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2020-10-29 09:14:20,134 INFO L138 BoogieDeclarations]: Found implementation of procedure process_prio_queue [2020-10-29 09:14:20,134 INFO L138 BoogieDeclarations]: Found implementation of procedure process_normal_queue [2020-10-29 09:14:20,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:14:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 09:14:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:14:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2020-10-29 09:14:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:14:20,136 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:14:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:14:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:14:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:14:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:14:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:14:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:14:20,137 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:14:20,138 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:14:20,138 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:14:20,138 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:14:20,138 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:14:20,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:14:20,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:14:20,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:14:20,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:14:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:14:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:14:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:14:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:14:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:14:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:14:20,139 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:14:20,140 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:14:20,140 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:14:20,140 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:14:20,140 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:14:20,140 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:14:20,141 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:14:20,141 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:14:20,141 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:14:20,142 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:14:20,142 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:14:20,142 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:14:20,142 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:14:20,142 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:14:20,142 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:14:20,143 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:14:20,143 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:14:20,144 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:14:20,144 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:14:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:14:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:14:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:14:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:14:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:14:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:14:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:14:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:14:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:14:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:14:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:14:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:14:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:14:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:14:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:14:20,148 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:14:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:14:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:14:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:14:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:14:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:14:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:14:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:14:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:14:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:14:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:14:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:14:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:14:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:14:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:14:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:14:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:14:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:14:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:14:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:14:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:14:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:14:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:14:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:14:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:14:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:14:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:14:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:14:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:14:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:14:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:14:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:14:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:14:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:14:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:14:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:14:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:14:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:14:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:14:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:14:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:14:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:14:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:14:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:14:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:14:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:14:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:14:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:14:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:14:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:14:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:14:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:14:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:14:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure receive [2020-10-29 09:14:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:14:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:14:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:14:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:14:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:14:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure send [2020-10-29 09:14:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2020-10-29 09:14:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:14:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure process_prio_queue [2020-10-29 09:14:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure process_normal_queue [2020-10-29 09:14:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:14:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-29 09:14:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:14:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:14:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:14:20,907 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:14:20,907 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-29 09:14:20,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:14:20 BoogieIcfgContainer [2020-10-29 09:14:20,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:14:20,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:14:20,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:14:20,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:14:20,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:14:19" (1/3) ... [2020-10-29 09:14:20,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4837cd70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:14:20, skipping insertion in model container [2020-10-29 09:14:20,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:14:19" (2/3) ... [2020-10-29 09:14:20,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4837cd70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:14:20, skipping insertion in model container [2020-10-29 09:14:20,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:14:20" (3/3) ... [2020-10-29 09:14:20,919 INFO L111 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2020-10-29 09:14:20,932 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:14:20,938 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:14:20,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:14:20,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:14:20,983 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:14:20,983 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:14:20,983 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:14:20,983 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:14:20,983 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:14:20,983 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:14:20,984 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:14:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-29 09:14:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:14:21,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:21,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:21,013 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:21,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1968323298, now seen corresponding path program 1 times [2020-10-29 09:14:21,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:21,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134221926] [2020-10-29 09:14:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:21,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:21,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:21,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:21,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:14:21,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:21,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-29 09:14:21,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:21,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:14:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:21,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:14:21,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:14:22,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:22,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:22,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:22,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:22,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:22,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 09:14:22,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:22,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:22,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:22,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134221926] [2020-10-29 09:14:22,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:14:22,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:14:22,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598473736] [2020-10-29 09:14:22,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:14:22,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:22,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:14:22,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:14:22,119 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 7 states. [2020-10-29 09:14:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:22,736 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2020-10-29 09:14:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:14:22,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-29 09:14:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:22,751 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:14:22,752 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:14:22,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:14:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:14:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2020-10-29 09:14:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:14:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-29 09:14:22,817 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 16 [2020-10-29 09:14:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:22,818 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-29 09:14:22,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:14:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-29 09:14:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:14:22,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:22,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:22,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:14:22,822 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash 168583672, now seen corresponding path program 1 times [2020-10-29 09:14:22,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:22,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043722436] [2020-10-29 09:14:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:22,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:23,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:23,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:14:23,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-29 09:14:23,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:23,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:14:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:23,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:14:23,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:23,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:23,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:23,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:23,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:23,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:23,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:14:23,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:23,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:23,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:23,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:23,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:14:23,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:14:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:23,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:23,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:23,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:14:23,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:23,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 09:14:23,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:23,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:14:23,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:14:23,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:14:23,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 09:14:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:23,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043722436] [2020-10-29 09:14:23,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:14:23,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 09:14:23,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289257905] [2020-10-29 09:14:23,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:14:23,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:23,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:14:23,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:14:23,394 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 9 states. [2020-10-29 09:14:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:24,137 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-10-29 09:14:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:14:24,139 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-29 09:14:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:24,141 INFO L225 Difference]: With dead ends: 99 [2020-10-29 09:14:24,141 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:14:24,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:14:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:14:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-10-29 09:14:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:14:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-10-29 09:14:24,157 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 23 [2020-10-29 09:14:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:24,157 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-10-29 09:14:24,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:14:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-10-29 09:14:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:14:24,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:24,159 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:24,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:14:24,160 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 734135223, now seen corresponding path program 1 times [2020-10-29 09:14:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:24,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156388574] [2020-10-29 09:14:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:24,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:24,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:24,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:14:24,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:24,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-29 09:14:24,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:24,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:24,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:14:24,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:24,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:14:24,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:24,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:24,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:24,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:24,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:24,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:24,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:14:24,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:24,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:24,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:24,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:14:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:24,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:24,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:24,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:14:24,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:24,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-29 09:14:24,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:24,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:24,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:24,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:14:24,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:14:24,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:25,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156388574] [2020-10-29 09:14:25,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:25,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:14:25,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225920088] [2020-10-29 09:14:25,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:14:25,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:25,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:14:25,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:14:25,131 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 11 states. [2020-10-29 09:14:25,380 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 09:14:26,751 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-29 09:14:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:27,221 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2020-10-29 09:14:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:14:27,225 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-29 09:14:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:27,227 INFO L225 Difference]: With dead ends: 139 [2020-10-29 09:14:27,227 INFO L226 Difference]: Without dead ends: 112 [2020-10-29 09:14:27,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:14:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-29 09:14:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 72. [2020-10-29 09:14:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:14:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-10-29 09:14:27,261 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 28 [2020-10-29 09:14:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:27,262 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-10-29 09:14:27,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:14:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-10-29 09:14:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:14:27,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:27,264 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:27,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:14:27,264 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2029962394, now seen corresponding path program 1 times [2020-10-29 09:14:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:27,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402553245] [2020-10-29 09:14:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:27,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:27,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:29,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:29,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:14:29,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:29,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2282 [2020-10-29 09:14:29,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:29,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:29,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:14:29,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:29,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:14:29,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:14:29,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:29,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:29,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:29,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:29,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:29,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:14:29,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:29,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:29,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:29,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:29,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:29,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:29,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:14:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:29,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:29,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:29,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:14:29,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:29,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 09:14:29,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:29,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:14:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:14:29,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:29,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-29 09:14:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:30,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:30,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:30,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:30,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:30,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-29 09:14:30,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:30,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:30,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:14:30,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:30,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:14:30,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:30,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402553245] [2020-10-29 09:14:30,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:30,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:14:30,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121671395] [2020-10-29 09:14:30,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:14:30,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:30,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:14:30,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:14:30,130 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 13 states. [2020-10-29 09:14:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:31,414 INFO L93 Difference]: Finished difference Result 131 states and 167 transitions. [2020-10-29 09:14:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:14:31,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-29 09:14:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:31,418 INFO L225 Difference]: With dead ends: 131 [2020-10-29 09:14:31,418 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:14:31,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:14:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:14:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2020-10-29 09:14:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:14:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2020-10-29 09:14:31,442 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 34 [2020-10-29 09:14:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:31,442 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2020-10-29 09:14:31,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:14:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2020-10-29 09:14:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:14:31,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:31,444 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:31,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:14:31,444 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2055639233, now seen corresponding path program 1 times [2020-10-29 09:14:31,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:31,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693069091] [2020-10-29 09:14:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:31,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:31,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:31,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:14:31,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:31,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-29 09:14:31,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:31,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:14:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:31,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:14:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:14:31,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:31,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:32,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:32,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:32,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:32,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:14:32,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:32,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:32,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:32,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:32,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:32,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:32,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:14:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:32,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:32,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:32,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:14:32,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:32,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-29 09:14:32,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:32,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:32,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:32,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:14:32,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:14:32,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:32,349 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-29 09:14:32,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-29 09:14:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:32,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:32,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:14:32,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:32,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 09:14:32,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:32,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:14:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:14:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:14:32,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:32,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693069091] [2020-10-29 09:14:32,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:32,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:14:32,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625937508] [2020-10-29 09:14:32,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:14:32,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:32,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:14:32,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:14:32,405 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 12 states. [2020-10-29 09:14:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:34,018 INFO L93 Difference]: Finished difference Result 141 states and 181 transitions. [2020-10-29 09:14:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:14:34,020 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-29 09:14:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:34,023 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:14:34,023 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:14:34,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:14:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:14:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-10-29 09:14:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 09:14:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2020-10-29 09:14:34,043 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 34 [2020-10-29 09:14:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:34,043 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2020-10-29 09:14:34,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:14:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2020-10-29 09:14:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:14:34,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:34,045 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:34,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:14:34,045 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:34,046 INFO L82 PathProgramCache]: Analyzing trace with hash -836392097, now seen corresponding path program 1 times [2020-10-29 09:14:34,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:34,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749620051] [2020-10-29 09:14:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:34,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:34,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:39,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:39,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:14:39,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:14:39,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:14:39,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:39,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:14:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:14:39,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:39,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:39,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:39,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:39,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:39,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:39,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:14:39,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:39,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:39,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:39,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:39,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:39,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:39,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:14:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:39,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:39,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:14:39,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:39,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 09:14:39,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:39,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:39,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:14:39,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:39,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:14:39,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:39,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 09:14:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:39,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:39,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:39,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:39,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:39,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-29 09:14:39,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:39,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:39,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:14:39,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:39,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:14:39,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:39,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749620051] [2020-10-29 09:14:39,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:39,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:14:39,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645328039] [2020-10-29 09:14:39,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:14:39,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:39,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:14:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:14:39,479 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand 13 states. [2020-10-29 09:14:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:40,830 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2020-10-29 09:14:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:14:40,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:14:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:40,833 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:14:40,833 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:14:40,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:14:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:14:40,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-10-29 09:14:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 09:14:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-10-29 09:14:40,851 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 35 [2020-10-29 09:14:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:40,852 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-10-29 09:14:40,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:14:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-10-29 09:14:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:14:40,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:40,854 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:40,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:14:40,854 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash -7824097, now seen corresponding path program 1 times [2020-10-29 09:14:40,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:40,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752693471] [2020-10-29 09:14:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:40,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:41,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:44,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:44,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:14:44,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:44,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3267 [2020-10-29 09:14:44,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:44,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:44,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:14:44,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:44,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:14:44,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:44,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:44,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:44,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:44,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:44,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:44,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:14:44,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:44,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:44,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:44,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:44,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:44,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:44,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:14:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:44,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:44,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:44,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:14:44,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:44,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-29 09:14:44,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:44,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:44,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:44,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:14:44,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:14:44,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:44,721 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-29 09:14:44,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 09:14:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:44,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:44,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:44,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:44,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:44,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-29 09:14:44,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:44,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:14:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:14:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:14:44,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:52,485 WARN L193 SmtUtils]: Spent 6.43 s on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 09:14:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:52,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752693471] [2020-10-29 09:14:52,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:52,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:14:52,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208551716] [2020-10-29 09:14:52,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:14:52,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:14:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:14:52,511 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 12 states. [2020-10-29 09:14:52,880 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-29 09:15:11,087 WARN L193 SmtUtils]: Spent 17.04 s on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 09:15:17,196 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 09:15:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:42,315 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2020-10-29 09:15:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:15:42,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-29 09:15:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:42,321 INFO L225 Difference]: With dead ends: 167 [2020-10-29 09:15:42,321 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:15:42,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:15:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:15:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 103. [2020-10-29 09:15:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:15:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2020-10-29 09:15:42,341 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 35 [2020-10-29 09:15:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:42,342 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2020-10-29 09:15:42,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:15:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2020-10-29 09:15:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:15:42,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:42,344 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:42,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:15:42,344 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -895284944, now seen corresponding path program 1 times [2020-10-29 09:15:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:42,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220159381] [2020-10-29 09:15:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:42,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:44,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:44,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:15:44,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:44,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2566 [2020-10-29 09:15:44,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:44,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:44,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:15:44,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:44,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:15:44,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:45,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:45,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:45,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:45,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:45,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:45,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:45,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:45,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:45,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:45,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:45,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:45,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:15:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:45,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:45,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:15:45,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:45,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 09:15:45,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:45,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:15:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:15:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:15:45,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:45,646 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-29 09:15:45,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-29 09:15:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:45,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:45,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:45,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:45,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 09:15:45,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:45,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:15:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:15:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:15:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:06,819 WARN L193 SmtUtils]: Spent 19.84 s on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 09:16:06,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-29 09:16:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:06,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:06,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:06,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:16:06,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:16:06,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:06,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:16:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:16:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:16:06,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:16:06,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220159381] [2020-10-29 09:16:06,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:06,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:16:06,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830998699] [2020-10-29 09:16:06,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:16:06,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:16:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:16:06,922 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand 14 states. [2020-10-29 09:16:10,168 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 172 DAG size of output: 92 [2020-10-29 09:16:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:47,724 INFO L93 Difference]: Finished difference Result 167 states and 220 transitions. [2020-10-29 09:16:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:16:47,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-29 09:16:47,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:47,734 INFO L225 Difference]: With dead ends: 167 [2020-10-29 09:16:47,734 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 09:16:47,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:16:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 09:16:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2020-10-29 09:16:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:16:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 149 transitions. [2020-10-29 09:16:47,757 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 149 transitions. Word has length 40 [2020-10-29 09:16:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:47,758 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 149 transitions. [2020-10-29 09:16:47,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:16:47,758 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 149 transitions. [2020-10-29 09:16:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:16:47,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:47,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:16:47,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:16:47,760 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash -848123250, now seen corresponding path program 2 times [2020-10-29 09:16:47,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:47,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075644512] [2020-10-29 09:16:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:47,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:48,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:48,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:16:48,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:48,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-29 09:16:48,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:48,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:48,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:16:48,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:16:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:16:48,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:16:48,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:16:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:48,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:48,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:16:48,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:48,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:16:48,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:48,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:16:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:16:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:16:48,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:48,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:16:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:48,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:48,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:48,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:16:48,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:48,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-29 09:16:48,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:48,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:16:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:16:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:16:48,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:16:48,988 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-10-29 09:16:49,969 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-29 09:16:49,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 09:16:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:49,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:50,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:16:50,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:16:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:16:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-29 09:16:50,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:16:50,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:16:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:16:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:16:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:16:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:16:50,697 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-29 09:16:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:16:50,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075644512] [2020-10-29 09:16:50,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:16:50,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:16:50,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767425437] [2020-10-29 09:16:50,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:16:50,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:16:50,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:16:50,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:16:50,713 INFO L87 Difference]: Start difference. First operand 117 states and 149 transitions. Second operand 14 states. [2020-10-29 09:16:51,314 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 09:16:51,778 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 09:16:52,611 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-29 09:16:54,857 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-29 09:16:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:16:57,413 INFO L93 Difference]: Finished difference Result 195 states and 258 transitions. [2020-10-29 09:16:57,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:16:57,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-29 09:16:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:16:57,422 INFO L225 Difference]: With dead ends: 195 [2020-10-29 09:16:57,422 INFO L226 Difference]: Without dead ends: 167 [2020-10-29 09:16:57,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:16:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-29 09:16:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2020-10-29 09:16:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:16:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2020-10-29 09:16:57,447 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 39 [2020-10-29 09:16:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:16:57,447 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2020-10-29 09:16:57,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:16:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2020-10-29 09:16:57,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:16:57,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:16:57,450 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:16:57,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:16:57,450 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:16:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:16:57,451 INFO L82 PathProgramCache]: Analyzing trace with hash -121734103, now seen corresponding path program 1 times [2020-10-29 09:16:57,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:16:57,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221860176] [2020-10-29 09:16:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:16:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:16:57,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:57,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:16:57,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:01,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:02,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:02,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:17:02,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:17:02,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 09:17:02,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:02,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:02,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:17:02,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:02,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:17:02,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:02,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:02,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:02,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:02,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:02,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:17:02,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:02,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:02,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:02,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:02,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:03,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:17:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:03,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:03,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:03,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:17:03,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:03,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 09:17:03,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:03,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:03,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:17:03,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:17:03,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:03,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 09:17:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:03,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:03,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:03,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:03,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:03,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-29 09:17:03,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:03,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:03,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:03,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:03,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:17:03,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:03,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 09:17:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:03,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:03,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:03,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:17:03,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:03,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:17:03,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:03,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:03,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:03,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:17:03,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:17:03,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:03,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221860176] [2020-10-29 09:17:03,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:03,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:17:03,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529114989] [2020-10-29 09:17:03,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:17:03,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:17:03,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:17:03,318 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand 14 states. [2020-10-29 09:17:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:06,123 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2020-10-29 09:17:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:17:06,128 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-29 09:17:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:06,131 INFO L225 Difference]: With dead ends: 157 [2020-10-29 09:17:06,131 INFO L226 Difference]: Without dead ends: 153 [2020-10-29 09:17:06,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:17:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-29 09:17:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2020-10-29 09:17:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:17:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2020-10-29 09:17:06,150 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 41 [2020-10-29 09:17:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:06,150 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2020-10-29 09:17:06,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:17:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2020-10-29 09:17:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:17:06,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:06,153 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:06,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:17:06,154 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash -119887061, now seen corresponding path program 1 times [2020-10-29 09:17:06,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:06,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018640210] [2020-10-29 09:17:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:06,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:06,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:06,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:17:06,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:06,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-29 09:17:06,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:06,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:17:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:17:06,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:06,735 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 12 [2020-10-29 09:17:06,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:06,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:06,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:06,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:06,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:06,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:06,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:06,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:06,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:06,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:06,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:06,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:06,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:17:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:06,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:06,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:06,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:17:06,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:06,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 09:17:06,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:06,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:06,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:06,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:17:06,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:07,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 09:17:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:07,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:07,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:07,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:07,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:07,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:17:07,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:07,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:17:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:07,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:07,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 09:17:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:07,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:07,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:07,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:17:07,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:07,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:17:07,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:07,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:07,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:07,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:17:07,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:07,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:07,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018640210] [2020-10-29 09:17:07,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:07,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 09:17:07,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302546229] [2020-10-29 09:17:07,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:17:07,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:07,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:17:07,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:17:07,069 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand 9 states. [2020-10-29 09:17:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:08,436 INFO L93 Difference]: Finished difference Result 270 states and 355 transitions. [2020-10-29 09:17:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:17:08,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-29 09:17:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:08,441 INFO L225 Difference]: With dead ends: 270 [2020-10-29 09:17:08,441 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:17:08,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:17:08,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:17:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2020-10-29 09:17:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-29 09:17:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2020-10-29 09:17:08,463 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 41 [2020-10-29 09:17:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:08,464 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2020-10-29 09:17:08,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:17:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2020-10-29 09:17:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:17:08,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:08,466 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:08,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:17:08,467 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:08,467 INFO L82 PathProgramCache]: Analyzing trace with hash -821486935, now seen corresponding path program 1 times [2020-10-29 09:17:08,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:08,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987676691] [2020-10-29 09:17:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:08,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:09,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:09,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:17:09,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:09,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-29 09:17:09,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:09,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:17:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:17:09,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:10,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:10,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:10,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:10,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:10,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:10,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:17:10,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:10,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:10,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:10,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:10,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:10,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:10,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:17:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:10,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:10,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:10,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:17:10,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 09:17:10,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:10,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:17:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:10,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:17:10,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:10,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 09:17:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:10,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:10,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:10,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:10,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:10,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-29 09:17:10,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:10,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:17:10,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:10,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 09:17:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:10,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:10,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:10,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:17:10,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:10,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:17:10,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:10,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:17:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:17:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:10,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987676691] [2020-10-29 09:17:10,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:10,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:17:10,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67698997] [2020-10-29 09:17:10,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:17:10,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:10,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:17:10,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:17:10,687 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand 17 states. [2020-10-29 09:17:13,472 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-29 09:17:13,640 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-29 09:17:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:14,011 INFO L93 Difference]: Finished difference Result 181 states and 238 transitions. [2020-10-29 09:17:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:17:14,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-29 09:17:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:14,018 INFO L225 Difference]: With dead ends: 181 [2020-10-29 09:17:14,018 INFO L226 Difference]: Without dead ends: 167 [2020-10-29 09:17:14,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:17:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-29 09:17:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 147. [2020-10-29 09:17:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-29 09:17:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2020-10-29 09:17:14,038 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 41 [2020-10-29 09:17:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:14,038 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2020-10-29 09:17:14,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:17:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2020-10-29 09:17:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:17:14,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:14,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:14,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:17:14,040 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash 689628045, now seen corresponding path program 1 times [2020-10-29 09:17:14,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:14,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168817517] [2020-10-29 09:17:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:14,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:14,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:16,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:16,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:17:16,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:16,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2187 [2020-10-29 09:17:16,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:16,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:16,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:17:16,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:16,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:17:16,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:16,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:16,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:16,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:16,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:16,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:16,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:16,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:16,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:16,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:16,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:16,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:17:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:16,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:16,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:16,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:17:16,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:16,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 09:17:16,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:16,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:17:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:17:16,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:17,826 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 09:17:17,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-29 09:17:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:17,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:17,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:17,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:17,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:17,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-29 09:17:17,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:17,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:17,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:17,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:17:17,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:17:17,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:18,080 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-29 09:17:18,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-29 09:17:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:18,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:18,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:18,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:18,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:18,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 09:17:18,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:18,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:17:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:17:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:17:18,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:18,851 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-29 09:17:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:18,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168817517] [2020-10-29 09:17:18,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:18,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:17:18,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457521745] [2020-10-29 09:17:18,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:17:18,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:17:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:17:18,874 INFO L87 Difference]: Start difference. First operand 147 states and 191 transitions. Second operand 15 states. [2020-10-29 09:17:20,479 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 59 [2020-10-29 09:17:21,272 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-10-29 09:17:23,329 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-29 09:17:23,484 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-29 09:17:24,836 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 09:17:26,890 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 92 [2020-10-29 09:17:28,703 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 84 [2020-10-29 09:17:34,995 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 72 [2020-10-29 09:17:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:37,976 INFO L93 Difference]: Finished difference Result 226 states and 296 transitions. [2020-10-29 09:17:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:17:37,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-29 09:17:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:37,985 INFO L225 Difference]: With dead ends: 226 [2020-10-29 09:17:37,985 INFO L226 Difference]: Without dead ends: 194 [2020-10-29 09:17:37,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:17:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-29 09:17:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 161. [2020-10-29 09:17:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-29 09:17:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2020-10-29 09:17:38,006 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 44 [2020-10-29 09:17:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:38,007 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2020-10-29 09:17:38,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:17:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2020-10-29 09:17:38,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:17:38,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:38,008 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:38,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:17:38,009 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1312088193, now seen corresponding path program 1 times [2020-10-29 09:17:38,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:38,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097628478] [2020-10-29 09:17:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:38,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:38,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:41,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:41,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:17:41,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:41,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3248 [2020-10-29 09:17:41,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:41,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:41,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:17:41,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:41,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:17:41,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:42,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:42,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:42,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:42,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:42,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:17:42,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:42,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:42,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:17:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:42,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:42,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:42,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:17:42,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:42,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 09:17:42,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:42,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:17:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:17:42,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:42,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-29 09:17:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:42,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:42,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:42,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:42,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:42,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-29 09:17:42,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:42,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:17:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:17:42,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:43,240 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-29 09:17:43,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 09:17:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:43,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:43,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:43,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:17:43,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:43,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-29 09:17:43,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:43,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:43,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:43,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:17:43,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:17:43,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:44,285 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-29 09:17:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:17:44,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097628478] [2020-10-29 09:17:44,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:44,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:17:44,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365609290] [2020-10-29 09:17:44,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:17:44,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:44,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:17:44,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:17:44,302 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 20 states. [2020-10-29 09:17:45,313 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-29 09:17:46,371 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-29 09:17:47,374 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 09:17:51,302 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-29 09:17:51,503 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-29 09:17:52,189 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-29 09:17:52,394 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-29 09:17:52,623 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-29 09:17:56,556 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-29 09:18:00,924 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-29 09:18:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:03,647 INFO L93 Difference]: Finished difference Result 252 states and 334 transitions. [2020-10-29 09:18:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:18:03,652 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-29 09:18:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:03,655 INFO L225 Difference]: With dead ends: 252 [2020-10-29 09:18:03,655 INFO L226 Difference]: Without dead ends: 224 [2020-10-29 09:18:03,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:18:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-29 09:18:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 166. [2020-10-29 09:18:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 09:18:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 215 transitions. [2020-10-29 09:18:03,680 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 215 transitions. Word has length 45 [2020-10-29 09:18:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:03,681 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 215 transitions. [2020-10-29 09:18:03,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:18:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 215 transitions. [2020-10-29 09:18:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:18:03,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:03,682 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:03,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:18:03,683 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:03,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:03,683 INFO L82 PathProgramCache]: Analyzing trace with hash -805406120, now seen corresponding path program 2 times [2020-10-29 09:18:03,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:03,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274486094] [2020-10-29 09:18:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:03,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:04,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:04,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:18:04,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:04,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-29 09:18:04,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:04,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:04,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:18:04,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:18:04,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:18:04,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:04,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:04,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:04,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:04,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:18:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:04,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:04,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:04,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:18:04,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:04,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 09:18:04,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:04,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:04,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:18:04,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:18:04,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:18:04,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:05,535 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 09:18:05,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 09:18:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:05,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:05,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:18:05,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:05,792 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-10-29 09:18:06,280 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-29 09:18:06,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 09:18:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:06,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:06,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:18:06,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:06,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:18:06,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:06,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:06,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:18:06,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:18:06,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:18:06,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:18:06,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274486094] [2020-10-29 09:18:06,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:06,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:18:06,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76927258] [2020-10-29 09:18:06,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:18:06,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:06,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:18:06,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:18:06,391 INFO L87 Difference]: Start difference. First operand 166 states and 215 transitions. Second operand 15 states. [2020-10-29 09:18:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:11,293 INFO L93 Difference]: Finished difference Result 221 states and 292 transitions. [2020-10-29 09:18:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:18:11,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-29 09:18:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:11,302 INFO L225 Difference]: With dead ends: 221 [2020-10-29 09:18:11,302 INFO L226 Difference]: Without dead ends: 201 [2020-10-29 09:18:11,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:18:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-29 09:18:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 161. [2020-10-29 09:18:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-29 09:18:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 208 transitions. [2020-10-29 09:18:11,346 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 208 transitions. Word has length 45 [2020-10-29 09:18:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:11,346 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 208 transitions. [2020-10-29 09:18:11,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:18:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 208 transitions. [2020-10-29 09:18:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:18:11,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:11,350 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:11,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:18:11,350 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:11,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1353534566, now seen corresponding path program 1 times [2020-10-29 09:18:11,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:11,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186178342] [2020-10-29 09:18:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:11,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:12,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:12,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:18:12,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:12,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-29 09:18:12,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:12,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:12,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:18:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:18:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:18:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:12,705 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-10-29 09:18:12,881 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2020-10-29 09:18:13,029 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-29 09:18:13,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:13,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:13,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:13,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:13,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:13,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:13,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:13,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:13,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:13,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:13,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:13,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:13,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:18:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:13,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:13,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:13,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:18:13,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:13,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 09:18:13,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:13,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:13,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:18:13,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:18:13,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:18:13,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:14,385 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 09:18:14,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 09:18:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:14,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:14,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:14,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:18:14,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:14,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 09:18:14,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:14,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:18:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:18:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:18:14,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:15,151 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-29 09:18:15,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-29 09:18:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:15,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:18:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:18:15,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0