/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:59:24,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:59:24,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:59:24,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:59:24,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:59:24,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:59:24,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:59:24,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:59:24,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:59:24,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:59:24,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:59:24,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:59:24,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:59:24,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:59:24,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:59:24,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:59:24,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:59:24,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:59:24,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:59:24,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:59:24,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:59:24,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:59:24,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:59:24,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:59:24,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:59:24,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:59:24,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:59:24,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:59:24,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:59:24,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:59:24,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:59:24,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:59:24,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:59:24,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:59:24,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:59:24,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:59:24,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:59:24,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:59:24,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:59:24,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:59:24,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:59:24,137 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 [2020-09-25 08:59:24,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:59:24,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:59:24,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:59:24,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:59:24,193 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:59:24,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:59:24,194 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:59:24,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:59:24,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:59:24,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:59:24,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:59:24,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:59:24,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:59:24,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:59:24,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:59:24,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:59:24,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:59:24,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:59:24,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:59:24,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:59:24,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:59:24,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:59:24,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:59:24,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:59:24,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:59:24,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:59:24,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:59:24,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:59:24,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:59:24,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 08:59:24,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:59:24,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:59:24,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:59:24,703 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:59:24,703 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:59:24,704 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 08:59:24,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65107cd6f/45f907d500234ff3820ad9102c0eda58/FLAGd19de9710 [2020-09-25 08:59:25,409 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:59:25,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 08:59:25,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65107cd6f/45f907d500234ff3820ad9102c0eda58/FLAGd19de9710 [2020-09-25 08:59:25,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65107cd6f/45f907d500234ff3820ad9102c0eda58 [2020-09-25 08:59:25,651 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:59:25,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:59:25,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:59:25,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:59:25,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:59:25,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:59:25" (1/1) ... [2020-09-25 08:59:25,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592fd428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:25, skipping insertion in model container [2020-09-25 08:59:25,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:59:25" (1/1) ... [2020-09-25 08:59:25,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:59:25,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:59:26,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:59:26,291 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:59:26,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:59:26,406 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:59:26,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26 WrapperNode [2020-09-25 08:59:26,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:59:26,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:59:26,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:59:26,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:59:26,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (1/1) ... [2020-09-25 08:59:26,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (1/1) ... [2020-09-25 08:59:26,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (1/1) ... [2020-09-25 08:59:26,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (1/1) ... [2020-09-25 08:59:26,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (1/1) ... [2020-09-25 08:59:26,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (1/1) ... [2020-09-25 08:59:26,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (1/1) ... [2020-09-25 08:59:26,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:59:26,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:59:26,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:59:26,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:59:26,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (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 [2020-09-25 08:59:26,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:59:26,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:59:26,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 08:59:26,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 08:59:26,573 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 08:59:26,573 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-25 08:59:26,573 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-25 08:59:26,573 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-25 08:59:26,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:59:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:59:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 08:59:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 08:59:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 08:59:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 08:59:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 08:59:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 08:59:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 08:59:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 08:59:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 08:59:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 08:59:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 08:59:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 08:59:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 08:59:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 08:59:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 08:59:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 08:59:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 08:59:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 08:59:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 08:59:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 08:59:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 08:59:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 08:59:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 08:59:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 08:59:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 08:59:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 08:59:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 08:59:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 08:59:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 08:59:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 08:59:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 08:59:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 08:59:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 08:59:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 08:59:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 08:59:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 08:59:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 08:59:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 08:59:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 08:59:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 08:59:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 08:59:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 08:59:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 08:59:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 08:59:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 08:59:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 08:59:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 08:59:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 08:59:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 08:59:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 08:59:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 08:59:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 08:59:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 08:59:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 08:59:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 08:59:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 08:59:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 08:59:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 08:59:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 08:59:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 08:59:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 08:59:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 08:59:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:59:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 08:59:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 08:59:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 08:59:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 08:59:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 08:59:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 08:59:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 08:59:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 08:59:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 08:59:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 08:59:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 08:59:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 08:59:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 08:59:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 08:59:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 08:59:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 08:59:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 08:59:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 08:59:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-25 08:59:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 08:59:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 08:59:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-25 08:59:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 08:59:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-25 08:59:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:59:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:59:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:59:26,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:59:26,946 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 08:59:27,121 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:59:27,122 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 08:59:27,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:59:27 BoogieIcfgContainer [2020-09-25 08:59:27,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:59:27,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:59:27,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:59:27,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:59:27,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:59:25" (1/3) ... [2020-09-25 08:59:27,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcd59df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:59:27, skipping insertion in model container [2020-09-25 08:59:27,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:59:26" (2/3) ... [2020-09-25 08:59:27,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcd59df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:59:27, skipping insertion in model container [2020-09-25 08:59:27,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:59:27" (3/3) ... [2020-09-25 08:59:27,138 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-09-25 08:59:27,150 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:59:27,160 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:59:27,182 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:59:27,209 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:59:27,209 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:59:27,209 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:59:27,209 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:59:27,210 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:59:27,210 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:59:27,210 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:59:27,210 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:59:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-25 08:59:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 08:59:27,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:27,241 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, 1, 1, 1, 1, 1, 1] [2020-09-25 08:59:27,241 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:27,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-09-25 08:59:27,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:27,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679511617] [2020-09-25 08:59:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:27,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:27,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:27,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 08:59:27,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:59:27,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-09-25 08:59:27,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:27,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 08:59:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:27,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:59:27,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:27,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:27,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:27,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:27,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:27,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 08:59:27,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:27,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:27,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 08:59:27,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 08:59:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:27,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:27,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:27,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:27,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:27,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 08:59:27,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:27,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:27,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 08:59:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:28,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:28,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:28,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:28,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:28,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 08:59:28,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:28,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:28,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:59:28,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679511617] [2020-09-25 08:59:28,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:59:28,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:59:28,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490113077] [2020-09-25 08:59:28,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:59:28,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:59:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:59:28,063 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 4 states. [2020-09-25 08:59:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:28,354 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2020-09-25 08:59:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:59:28,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 08:59:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:28,372 INFO L225 Difference]: With dead ends: 154 [2020-09-25 08:59:28,373 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 08:59:28,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:59:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 08:59:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-09-25 08:59:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 08:59:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-25 08:59:28,447 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 29 [2020-09-25 08:59:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:28,447 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-25 08:59:28,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:59:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-25 08:59:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 08:59:28,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:28,449 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:59:28,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:59:28,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:28,451 INFO L82 PathProgramCache]: Analyzing trace with hash 632987872, now seen corresponding path program 1 times [2020-09-25 08:59:28,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:28,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787880490] [2020-09-25 08:59:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:28,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:28,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:28,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:28,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:28,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:29,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 08:59:29,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:59:29,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-09-25 08:59:29,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:29,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:29,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:59:29,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:59:29,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 08:59:29,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:29,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:29,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:29,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:29,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:59:29,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:29,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:29,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:29,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:29,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 08:59:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:29,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:29,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:29,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 08:59:29,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:29,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:59:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 08:59:29,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:29,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-25 08:59:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:29,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:29,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:29,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:29,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 08:59:29,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:29,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:29,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:59:29,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787880490] [2020-09-25 08:59:29,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:59:29,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 08:59:29,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387978760] [2020-09-25 08:59:29,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 08:59:29,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 08:59:29,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:59:29,313 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 7 states. [2020-09-25 08:59:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:29,710 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-09-25 08:59:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 08:59:29,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 08:59:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:29,713 INFO L225 Difference]: With dead ends: 114 [2020-09-25 08:59:29,713 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 08:59:29,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:59:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 08:59:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-09-25 08:59:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 08:59:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-09-25 08:59:29,729 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 33 [2020-09-25 08:59:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:29,730 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-09-25 08:59:29,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 08:59:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-09-25 08:59:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 08:59:29,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:29,733 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] [2020-09-25 08:59:29,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:59:29,734 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2090477770, now seen corresponding path program 1 times [2020-09-25 08:59:29,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:29,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916998348] [2020-09-25 08:59:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:29,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:29,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:30,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:30,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:32,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:32,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 08:59:32,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:59:32,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2699 [2020-09-25 08:59:32,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:32,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:59:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:59:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 08:59:32,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:32,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:32,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:32,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:32,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:32,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:59:32,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:32,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:32,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:32,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:32,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:32,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:32,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 08:59:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:32,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:32,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:32,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:32,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 08:59:32,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:32,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:32,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:59:32,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 08:59:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:32,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:32,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:32,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:32,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:59:32,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:32,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:32,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:32,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:32,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 08:59:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:59:32,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916998348] [2020-09-25 08:59:32,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:59:32,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:59:32,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301896172] [2020-09-25 08:59:32,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:59:32,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:59:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:59:32,562 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 6 states. [2020-09-25 08:59:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:32,942 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2020-09-25 08:59:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 08:59:32,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-25 08:59:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:32,945 INFO L225 Difference]: With dead ends: 143 [2020-09-25 08:59:32,945 INFO L226 Difference]: Without dead ends: 88 [2020-09-25 08:59:32,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:59:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-25 08:59:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2020-09-25 08:59:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 08:59:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-09-25 08:59:32,967 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 41 [2020-09-25 08:59:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:32,968 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-09-25 08:59:32,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:59:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-09-25 08:59:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 08:59:32,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:32,972 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, 1, 1] [2020-09-25 08:59:32,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:59:32,972 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash 226602169, now seen corresponding path program 1 times [2020-09-25 08:59:32,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:32,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428161346] [2020-09-25 08:59:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:33,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:33,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:33,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:33,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:33,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:33,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:33,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 08:59:33,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:59:33,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-09-25 08:59:33,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:33,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:59:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:59:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 08:59:33,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:33,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:33,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:33,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:33,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:33,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:33,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:59:33,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:33,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:33,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:33,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 08:59:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:34,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:34,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:34,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:34,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 08:59:34,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:34,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:34,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:59:34,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:34,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 08:59:34,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:34,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-25 08:59:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:34,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:34,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:34,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:34,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:34,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:59:34,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:34,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:34,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:34,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:34,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:34,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:59:34,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428161346] [2020-09-25 08:59:34,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:59:34,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 08:59:34,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494009665] [2020-09-25 08:59:34,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 08:59:34,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 08:59:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 08:59:34,080 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 9 states. [2020-09-25 08:59:34,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:34,619 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2020-09-25 08:59:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:59:34,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-25 08:59:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:34,622 INFO L225 Difference]: With dead ends: 135 [2020-09-25 08:59:34,622 INFO L226 Difference]: Without dead ends: 115 [2020-09-25 08:59:34,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:59:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-25 08:59:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-09-25 08:59:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 08:59:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-09-25 08:59:34,649 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 43 [2020-09-25 08:59:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:34,650 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-09-25 08:59:34,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 08:59:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-09-25 08:59:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 08:59:34,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:34,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:59:34,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:59:34,659 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:34,660 INFO L82 PathProgramCache]: Analyzing trace with hash 360366586, now seen corresponding path program 1 times [2020-09-25 08:59:34,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:34,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563266922] [2020-09-25 08:59:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:34,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:35,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:37,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:37,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 08:59:37,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 08:59:37,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2751 [2020-09-25 08:59:37,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:37,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:59:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 08:59:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 08:59:37,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:37,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:37,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:37,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:37,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:37,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:37,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 08:59:37,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:37,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:37,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:37,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:37,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:37,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:37,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 08:59:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:37,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:37,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:37,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 08:59:37,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:37,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-25 08:59:37,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:37,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:37,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 08:59:37,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:37,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 08:59:37,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:37,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 08:59:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:37,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:37,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:37,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:37,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:37,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 08:59:37,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:37,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 08:59:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 08:59:37,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:59:37,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563266922] [2020-09-25 08:59:37,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:59:37,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 08:59:37,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901775415] [2020-09-25 08:59:37,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 08:59:37,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:37,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 08:59:37,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-25 08:59:37,876 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 13 states. [2020-09-25 08:59:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:38,588 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-09-25 08:59:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 08:59:38,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-09-25 08:59:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:38,596 INFO L225 Difference]: With dead ends: 123 [2020-09-25 08:59:38,596 INFO L226 Difference]: Without dead ends: 118 [2020-09-25 08:59:38,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-09-25 08:59:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-25 08:59:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2020-09-25 08:59:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 08:59:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2020-09-25 08:59:38,624 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 44 [2020-09-25 08:59:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:38,624 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-09-25 08:59:38,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 08:59:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2020-09-25 08:59:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 08:59:38,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:38,626 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, 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] [2020-09-25 08:59:38,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:59:38,627 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:38,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:38,627 INFO L82 PathProgramCache]: Analyzing trace with hash -642872939, now seen corresponding path program 1 times [2020-09-25 08:59:38,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:38,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371483884] [2020-09-25 08:59:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:38,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:38,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:38,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 08:59:38,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:38,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-25 08:59:38,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:38,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:59:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:59:38,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 08:59:38,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:38,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:38,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:38,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:38,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:38,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:59:38,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:38,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:38,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:38,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:38,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:38,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:59:38,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 08:59:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:38,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:38,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 08:59:38,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:39,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-25 08:59:39,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:39,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:39,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:59:39,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:39,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 08:59:39,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:39,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 08:59:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:39,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:39,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:39,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 08:59:39,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:39,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 08:59:39,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:39,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 08:59:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:39,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:59:39,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371483884] [2020-09-25 08:59:39,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:59:39,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 08:59:39,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028971337] [2020-09-25 08:59:39,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 08:59:39,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:39,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 08:59:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 08:59:39,101 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand 9 states. [2020-09-25 08:59:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:39,489 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2020-09-25 08:59:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:59:39,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-09-25 08:59:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:39,491 INFO L225 Difference]: With dead ends: 146 [2020-09-25 08:59:39,491 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 08:59:39,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:59:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 08:59:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-09-25 08:59:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-25 08:59:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-09-25 08:59:39,521 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 51 [2020-09-25 08:59:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:39,521 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-09-25 08:59:39,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 08:59:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-09-25 08:59:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 08:59:39,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:39,527 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:59:39,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:59:39,527 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:39,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:39,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1391720975, now seen corresponding path program 2 times [2020-09-25 08:59:39,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:39,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601840084] [2020-09-25 08:59:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:39,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:39,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:39,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:39,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:40,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:40,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:41,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:42,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:42,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 08:59:42,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:59:42,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3187 [2020-09-25 08:59:42,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:42,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:42,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:59:42,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 08:59:42,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 08:59:42,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:42,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:42,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:42,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:42,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:42,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:42,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:59:42,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:42,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:42,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:42,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:42,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-25 08:59:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:42,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:42,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:42,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:42,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:59:42,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:42,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:42,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:42,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 08:59:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:42,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:42,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:42,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:42,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:59:42,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:42,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:42,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:42,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:42,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:42,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 08:59:42,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601840084] [2020-09-25 08:59:42,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:59:42,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:59:42,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025680174] [2020-09-25 08:59:42,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:59:42,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:42,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:59:42,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:59:42,842 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 5 states. [2020-09-25 08:59:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:43,055 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2020-09-25 08:59:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:59:43,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-09-25 08:59:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:43,058 INFO L225 Difference]: With dead ends: 179 [2020-09-25 08:59:43,058 INFO L226 Difference]: Without dead ends: 109 [2020-09-25 08:59:43,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:59:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-25 08:59:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-09-25 08:59:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-25 08:59:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2020-09-25 08:59:43,083 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 51 [2020-09-25 08:59:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:43,084 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2020-09-25 08:59:43,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:59:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2020-09-25 08:59:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 08:59:43,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:43,087 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:59:43,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:59:43,088 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:43,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1801872195, now seen corresponding path program 2 times [2020-09-25 08:59:43,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:43,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043380211] [2020-09-25 08:59:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:43,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:43,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:43,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:45,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:45,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 08:59:45,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:59:45,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2404 [2020-09-25 08:59:45,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:45,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:45,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:59:45,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:59:45,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 08:59:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:45,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:45,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:45,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:45,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:45,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:45,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:59:45,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:45,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:45,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:45,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:45,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:45,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:45,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 08:59:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:45,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:45,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:45,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 08:59:45,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:45,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-09-25 08:59:45,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:45,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:45,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:59:45,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:45,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 08:59:45,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:45,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 08:59:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:45,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:45,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:45,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:45,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:45,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:59:45,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:45,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:45,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:59:45,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043380211] [2020-09-25 08:59:45,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:59:45,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 08:59:45,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637821466] [2020-09-25 08:59:45,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 08:59:45,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:45,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 08:59:45,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:59:45,825 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand 11 states. [2020-09-25 08:59:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:46,390 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2020-09-25 08:59:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 08:59:46,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-09-25 08:59:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:46,392 INFO L225 Difference]: With dead ends: 160 [2020-09-25 08:59:46,393 INFO L226 Difference]: Without dead ends: 136 [2020-09-25 08:59:46,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-25 08:59:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-25 08:59:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2020-09-25 08:59:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 08:59:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2020-09-25 08:59:46,403 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 53 [2020-09-25 08:59:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:46,404 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2020-09-25 08:59:46,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 08:59:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2020-09-25 08:59:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 08:59:46,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:46,405 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:59:46,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 08:59:46,405 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 840072530, now seen corresponding path program 3 times [2020-09-25 08:59:46,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:46,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962125530] [2020-09-25 08:59:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:46,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:46,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:46,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:46,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:46,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:47,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:47,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 08:59:47,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:59:47,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-09-25 08:59:47,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:47,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:59:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:59:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 08:59:47,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:47,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:47,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:47,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:47,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:47,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:59:47,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:47,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:47,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:47,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 08:59:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:47,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:47,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:47,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:47,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 08:59:47,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:47,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:59:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 08:59:47,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:47,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 08:59:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:47,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:47,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:47,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:47,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:47,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:59:47,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:47,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:47,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:47,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:47,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:47,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:59:47,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962125530] [2020-09-25 08:59:47,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:59:47,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-25 08:59:47,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063727835] [2020-09-25 08:59:47,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 08:59:47,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:47,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 08:59:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:59:47,571 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand 11 states. [2020-09-25 08:59:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:48,114 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2020-09-25 08:59:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 08:59:48,115 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-09-25 08:59:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:48,117 INFO L225 Difference]: With dead ends: 160 [2020-09-25 08:59:48,117 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 08:59:48,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-09-25 08:59:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 08:59:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 96. [2020-09-25 08:59:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 08:59:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-09-25 08:59:48,134 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 53 [2020-09-25 08:59:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:48,135 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-09-25 08:59:48,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 08:59:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-09-25 08:59:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 08:59:48,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:48,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:59:48,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 08:59:48,136 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash -243195669, now seen corresponding path program 1 times [2020-09-25 08:59:48,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:48,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166401738] [2020-09-25 08:59:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:48,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:48,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:48,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:49,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:49,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 08:59:49,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:59:49,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1516 [2020-09-25 08:59:49,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:49,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:59:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:59:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 08:59:49,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:49,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:49,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:49,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:49,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:49,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:59:49,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:49,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:49,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:49,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:49,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:49,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:49,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 08:59:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:49,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:49,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:49,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 08:59:49,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:49,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 08:59:49,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:49,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:59:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 08:59:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:49,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 08:59:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:49,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:49,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:49,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 08:59:49,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:49,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 08:59:49,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:49,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:49,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:49,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 08:59:49,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:49,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:59:49,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166401738] [2020-09-25 08:59:49,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:59:49,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 08:59:49,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703890097] [2020-09-25 08:59:49,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 08:59:49,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 08:59:49,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:59:49,925 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 11 states. [2020-09-25 08:59:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:50,565 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-09-25 08:59:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 08:59:50,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 08:59:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:50,568 INFO L225 Difference]: With dead ends: 154 [2020-09-25 08:59:50,568 INFO L226 Difference]: Without dead ends: 130 [2020-09-25 08:59:50,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-09-25 08:59:50,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-25 08:59:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2020-09-25 08:59:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 08:59:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-09-25 08:59:50,578 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 59 [2020-09-25 08:59:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:50,579 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-09-25 08:59:50,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 08:59:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-09-25 08:59:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 08:59:50,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:50,580 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:59:50,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 08:59:50,580 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -655327975, now seen corresponding path program 1 times [2020-09-25 08:59:50,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:50,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479307243] [2020-09-25 08:59:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:50,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:50,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:51,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:51,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:51,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:51,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:55,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:55,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 08:59:55,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:59:55,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 08:59:55,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:55,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:59:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 08:59:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 08:59:55,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:55,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:55,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:55,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:55,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:55,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:55,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 08:59:55,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:55,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:55,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 08:59:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:55,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:55,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:55,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 08:59:55,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:55,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-25 08:59:55,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:55,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:55,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:59:55,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:55,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 08:59:55,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:55,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 08:59:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:55,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:55,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:55,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:55,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:55,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:59:55,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:55,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 08:59:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:55,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:59:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:59:55,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479307243] [2020-09-25 08:59:55,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:59:55,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 08:59:55,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191170053] [2020-09-25 08:59:55,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 08:59:55,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:55,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 08:59:55,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 08:59:55,980 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 13 states. [2020-09-25 08:59:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:56,609 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2020-09-25 08:59:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 08:59:56,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-25 08:59:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:56,611 INFO L225 Difference]: With dead ends: 149 [2020-09-25 08:59:56,611 INFO L226 Difference]: Without dead ends: 116 [2020-09-25 08:59:56,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2020-09-25 08:59:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-25 08:59:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2020-09-25 08:59:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 08:59:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-09-25 08:59:56,624 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 61 [2020-09-25 08:59:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:56,625 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-09-25 08:59:56,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 08:59:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-09-25 08:59:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 08:59:56,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:56,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 08:59:56,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 08:59:56,626 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:56,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:56,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1727079450, now seen corresponding path program 3 times [2020-09-25 08:59:56,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:56,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896846266] [2020-09-25 08:59:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:56,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:56,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:57,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 08:59:57,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:59:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-09-25 08:59:57,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:57,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 08:59:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 08:59:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 08:59:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:57,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:57,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:57,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:57,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:57,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:57,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:59:57,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:57,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:57,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:57,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:57,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:57,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:57,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 08:59:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:57,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:57,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:57,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 08:59:57,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:57,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-09-25 08:59:57,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:57,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:57,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:59:57,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:57,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 08:59:57,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:57,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 08:59:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:57,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:57,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:57,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 08:59:57,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:57,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 08:59:57,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:57,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:57,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:59:57,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:57,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 08:59:57,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:59:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 08:59:57,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896846266] [2020-09-25 08:59:57,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:59:57,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-25 08:59:57,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408868760] [2020-09-25 08:59:57,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 08:59:57,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 08:59:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:59:57,510 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 12 states. [2020-09-25 08:59:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:59:58,017 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-09-25 08:59:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:59:58,018 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-09-25 08:59:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:59:58,019 INFO L225 Difference]: With dead ends: 91 [2020-09-25 08:59:58,019 INFO L226 Difference]: Without dead ends: 83 [2020-09-25 08:59:58,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-09-25 08:59:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-25 08:59:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-09-25 08:59:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 08:59:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-09-25 08:59:58,025 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 62 [2020-09-25 08:59:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:59:58,025 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-09-25 08:59:58,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 08:59:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-09-25 08:59:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 08:59:58,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:59:58,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2020-09-25 08:59:58,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 08:59:58,026 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:59:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:59:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1187742581, now seen corresponding path program 2 times [2020-09-25 08:59:58,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:59:58,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200848703] [2020-09-25 08:59:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:59:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:58,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:59,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:59,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 08:59:59,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:59:59,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-09-25 08:59:59,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:59,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:59,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 08:59:59,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-25 08:59:59,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 08:59:59,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:59,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:59:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:59,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:59,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:59,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:59:59,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:59,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:59:59,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:59,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:59,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:59:59,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:59,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:59:59,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:59,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 08:59:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:59,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:59,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 08:59:59,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:59,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-25 08:59:59,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:59,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:59,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:59:59,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:59:59,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 08:59:59,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:59,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 08:59:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:59:59,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:59:59,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:59:59,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 08:59:59,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:59:59,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 08:59:59,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:59:59,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:59:59,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:59:59,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 08:59:59,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 08:59:59,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:59:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 08:59:59,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200848703] [2020-09-25 08:59:59,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:59:59,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 08:59:59,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726637665] [2020-09-25 08:59:59,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 08:59:59,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:59:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 08:59:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:59:59,578 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 16 states. [2020-09-25 09:00:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:00,469 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-09-25 09:00:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 09:00:00,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-09-25 09:00:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:00,470 INFO L225 Difference]: With dead ends: 98 [2020-09-25 09:00:00,470 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 09:00:00,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-09-25 09:00:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 09:00:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-25 09:00:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 09:00:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-09-25 09:00:00,480 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 69 [2020-09-25 09:00:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:00,481 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-09-25 09:00:00,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 09:00:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-09-25 09:00:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 09:00:00,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:00,482 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:00:00,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 09:00:00,482 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:00,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash 979580858, now seen corresponding path program 3 times [2020-09-25 09:00:00,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:00,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67143623] [2020-09-25 09:00:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:00,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:01,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:01,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:01,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:01,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:02,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:02,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:02,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:04,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:04,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:05,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:05,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 09:00:05,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 09:00:05,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 09:00:05,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:05,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:00:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:00:05,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-25 09:00:05,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:05,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:00:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:05,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:05,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:05,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:00:05,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:05,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 09:00:05,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:05,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:00:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:00:05,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:05,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 09:00:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:05,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:05,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:05,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:05,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 09:00:05,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:00:05,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-09-25 09:00:05,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:05,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:00:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 09:00:05,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:00:05,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 09:00:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:00:05,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:00:05,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:00:05,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 09:00:05,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:00:05,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-25 09:00:05,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:00:05,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:00:05,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:00:05,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:00:05,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 09:00:05,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:00:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-25 09:00:06,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67143623] [2020-09-25 09:00:06,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:00:06,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 09:00:06,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9892628] [2020-09-25 09:00:06,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 09:00:06,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:00:06,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 09:00:06,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:00:06,009 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 12 states. [2020-09-25 09:00:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:00:06,718 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-09-25 09:00:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:00:06,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-25 09:00:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:00:06,719 INFO L225 Difference]: With dead ends: 120 [2020-09-25 09:00:06,719 INFO L226 Difference]: Without dead ends: 115 [2020-09-25 09:00:06,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-09-25 09:00:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-25 09:00:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-09-25 09:00:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 09:00:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-09-25 09:00:06,727 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 76 [2020-09-25 09:00:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:00:06,728 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-09-25 09:00:06,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 09:00:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-09-25 09:00:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 09:00:06,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:00:06,729 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 09:00:06,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 09:00:06,729 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:00:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:00:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1305863211, now seen corresponding path program 4 times [2020-09-25 09:00:06,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:00:06,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114969099] [2020-09-25 09:00:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:00:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:00:06,752 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:00:06,752 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:00:06,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 09:00:06,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:00:06 BoogieIcfgContainer [2020-09-25 09:00:06,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:00:06,789 INFO L168 Benchmark]: Toolchain (without parser) took 41135.06 ms. Allocated memory was 140.5 MB in the beginning and 487.6 MB in the end (delta: 347.1 MB). Free memory was 101.1 MB in the beginning and 166.1 MB in the end (delta: -65.0 MB). Peak memory consumption was 282.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:00:06,790 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 09:00:06,791 INFO L168 Benchmark]: CACSL2BoogieTranslator took 749.19 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 100.4 MB in the beginning and 170.8 MB in the end (delta: -70.5 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-09-25 09:00:06,792 INFO L168 Benchmark]: Boogie Preprocessor took 74.93 ms. Allocated memory is still 205.0 MB. Free memory was 170.8 MB in the beginning and 168.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-25 09:00:06,792 INFO L168 Benchmark]: RCFGBuilder took 646.35 ms. Allocated memory is still 205.0 MB. Free memory was 168.2 MB in the beginning and 122.0 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-09-25 09:00:06,793 INFO L168 Benchmark]: TraceAbstraction took 39655.41 ms. Allocated memory was 205.0 MB in the beginning and 487.6 MB in the end (delta: 282.6 MB). Free memory was 122.0 MB in the beginning and 166.1 MB in the end (delta: -44.1 MB). Peak memory consumption was 238.5 MB. Max. memory is 7.1 GB. [2020-09-25 09:00:06,797 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 749.19 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 100.4 MB in the beginning and 170.8 MB in the end (delta: -70.5 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.93 ms. Allocated memory is still 205.0 MB. Free memory was 170.8 MB in the beginning and 168.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 646.35 ms. Allocated memory is still 205.0 MB. Free memory was 168.2 MB in the beginning and 122.0 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39655.41 ms. Allocated memory was 205.0 MB in the beginning and 487.6 MB in the end (delta: 282.6 MB). Free memory was 122.0 MB in the beginning and 166.1 MB in the end (delta: -44.1 MB). Peak memory consumption was 238.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] RET, EXPR sll_create(len + 1) [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] RET, EXPR sll_length(s) [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.5s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 870 SDtfs, 1769 SDslu, 2014 SDs, 0 SdLazy, 4432 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 306 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 292 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 31.1s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 711 ConstructedInterpolants, 0 QuantifiedInterpolants, 104330 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 120/169 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...