/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:22:52,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:22:52,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:22:52,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:22:52,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:22:52,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:22:52,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:22:52,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:22:52,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:22:52,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:22:52,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:22:52,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:22:52,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:22:52,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:22:52,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:22:52,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:22:52,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:22:52,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:22:52,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:22:52,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:22:52,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:22:52,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:22:52,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:22:52,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:22:52,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:22:52,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:22:52,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:22:52,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:22:52,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:22:52,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:22:52,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:22:52,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:22:52,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:22:52,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:22:52,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:22:52,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:22:52,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:22:52,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:22:52,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:22:52,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:22:52,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:22:52,272 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 [2020-09-24 19:22:52,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:22:52,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:22:52,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:22:52,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:22:52,301 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:22:52,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:22:52,302 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:22:52,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:22:52,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:22:52,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:22:52,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:22:52,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:22:52,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:22:52,303 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:22:52,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:22:52,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:22:52,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:22:52,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:22:52,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:22:52,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:22:52,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:22:52,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:22:52,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:22:52,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:22:52,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:22:52,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:22:52,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:22:52,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:22:52,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:22:52,307 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:22:52,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:22:52,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:22:52,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:22:52,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:22:52,837 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:22:52,838 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-09-24 19:22:52,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e56c4e85/45513d99c5874ccb82ec014a7ebc7ffe/FLAGbd83230fb [2020-09-24 19:22:53,591 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:22:53,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-09-24 19:22:53,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e56c4e85/45513d99c5874ccb82ec014a7ebc7ffe/FLAGbd83230fb [2020-09-24 19:22:53,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e56c4e85/45513d99c5874ccb82ec014a7ebc7ffe [2020-09-24 19:22:53,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:22:53,856 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:22:53,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:22:53,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:22:53,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:22:53,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:22:53" (1/1) ... [2020-09-24 19:22:53,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5530b36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:53, skipping insertion in model container [2020-09-24 19:22:53,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:22:53" (1/1) ... [2020-09-24 19:22:53,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:22:53,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:22:54,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:22:54,423 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:22:54,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:22:54,571 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:22:54,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54 WrapperNode [2020-09-24 19:22:54,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:22:54,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:22:54,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:22:54,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:22:54,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (1/1) ... [2020-09-24 19:22:54,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (1/1) ... [2020-09-24 19:22:54,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (1/1) ... [2020-09-24 19:22:54,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (1/1) ... [2020-09-24 19:22:54,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (1/1) ... [2020-09-24 19:22:54,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (1/1) ... [2020-09-24 19:22:54,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (1/1) ... [2020-09-24 19:22:54,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:22:54,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:22:54,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:22:54,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:22:54,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (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 [2020-09-24 19:22:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:22:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:22:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 19:22:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 19:22:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-24 19:22:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-24 19:22:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-24 19:22:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 19:22:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:22:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:22:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:22:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 19:22:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 19:22:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 19:22:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 19:22:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 19:22:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 19:22:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 19:22:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 19:22:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 19:22:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 19:22:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 19:22:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 19:22:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 19:22:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 19:22:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 19:22:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 19:22:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 19:22:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 19:22:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-24 19:22:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-24 19:22:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-24 19:22:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 19:22:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 19:22:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 19:22:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 19:22:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 19:22:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 19:22:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 19:22:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 19:22:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 19:22:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 19:22:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 19:22:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 19:22:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 19:22:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 19:22:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 19:22:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 19:22:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 19:22:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 19:22:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 19:22:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 19:22:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 19:22:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 19:22:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 19:22:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 19:22:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 19:22:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 19:22:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 19:22:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 19:22:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 19:22:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 19:22:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 19:22:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 19:22:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 19:22:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 19:22:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 19:22:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 19:22:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 19:22:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 19:22:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 19:22:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 19:22:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 19:22:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 19:22:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:22:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 19:22:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 19:22:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 19:22:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 19:22:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 19:22:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 19:22:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 19:22:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 19:22:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 19:22:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 19:22:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 19:22:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 19:22:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 19:22:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 19:22:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 19:22:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 19:22:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 19:22:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 19:22:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 19:22:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 19:22:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 19:22:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 19:22:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 19:22:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 19:22:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 19:22:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 19:22:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 19:22:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 19:22:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 19:22:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 19:22:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 19:22:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 19:22:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 19:22:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 19:22:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 19:22:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 19:22:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 19:22:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 19:22:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 19:22:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 19:22:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 19:22:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 19:22:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 19:22:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 19:22:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:22:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 19:22:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:22:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 19:22:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 19:22:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:22:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:22:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:22:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:22:55,102 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 19:22:55,321 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:22:55,321 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 19:22:55,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:22:55 BoogieIcfgContainer [2020-09-24 19:22:55,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:22:55,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:22:55,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:22:55,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:22:55,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:22:53" (1/3) ... [2020-09-24 19:22:55,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c82d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:22:55, skipping insertion in model container [2020-09-24 19:22:55,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:22:54" (2/3) ... [2020-09-24 19:22:55,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c82d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:22:55, skipping insertion in model container [2020-09-24 19:22:55,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:22:55" (3/3) ... [2020-09-24 19:22:55,336 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-09-24 19:22:55,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:22:55,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:22:55,383 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:22:55,416 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:22:55,417 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:22:55,417 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:22:55,417 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:22:55,417 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:22:55,418 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:22:55,418 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:22:55,418 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:22:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-09-24 19:22:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 19:22:55,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:22:55,460 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] [2020-09-24 19:22:55,461 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:22:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:22:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1227115345, now seen corresponding path program 1 times [2020-09-24 19:22:55,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:22:55,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237977765] [2020-09-24 19:22:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:22:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:55,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:55,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:55,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:55,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:55,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:56,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:56,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 19:22:56,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:22:56,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-09-24 19:22:56,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:22:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 19:22:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:22:56,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:22:56,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:22:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:56,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:56,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:56,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:22:56,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:22:56,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:22:56,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:22:56,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:22:56,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:22:56,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:22:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:22:56,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237977765] [2020-09-24 19:22:56,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:22:56,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:22:56,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913333541] [2020-09-24 19:22:56,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:22:56,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:22:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:22:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:22:56,287 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-09-24 19:22:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:22:56,461 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-09-24 19:22:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:22:56,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-24 19:22:56,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:22:56,475 INFO L225 Difference]: With dead ends: 110 [2020-09-24 19:22:56,475 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 19:22:56,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:22:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 19:22:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-24 19:22:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 19:22:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-24 19:22:56,534 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 22 [2020-09-24 19:22:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:22:56,534 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-24 19:22:56,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:22:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-24 19:22:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 19:22:56,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:22:56,537 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] [2020-09-24 19:22:56,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:22:56,537 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:22:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:22:56,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1237633361, now seen corresponding path program 1 times [2020-09-24 19:22:56,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:22:56,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356930211] [2020-09-24 19:22:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:22:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:56,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:56,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 19:22:56,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:22:56,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-24 19:22:56,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:22:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:22:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 19:22:56,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:22:56,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:22:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:56,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:56,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:22:56,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:22:56,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 19:22:56,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:22:56,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:22:56,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:22:56,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:22:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:22:56,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356930211] [2020-09-24 19:22:56,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:22:56,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:22:56,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812750040] [2020-09-24 19:22:56,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:22:56,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:22:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:22:56,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:22:56,795 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-09-24 19:22:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:22:57,049 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-09-24 19:22:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:22:57,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-09-24 19:22:57,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:22:57,052 INFO L225 Difference]: With dead ends: 134 [2020-09-24 19:22:57,052 INFO L226 Difference]: Without dead ends: 128 [2020-09-24 19:22:57,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:22:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-24 19:22:57,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70. [2020-09-24 19:22:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 19:22:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-09-24 19:22:57,067 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 30 [2020-09-24 19:22:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:22:57,068 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-09-24 19:22:57,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:22:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-09-24 19:22:57,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 19:22:57,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:22:57,070 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] [2020-09-24 19:22:57,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:22:57,070 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:22:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:22:57,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1213729417, now seen corresponding path program 1 times [2020-09-24 19:22:57,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:22:57,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537432076] [2020-09-24 19:22:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:22:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:57,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:57,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:57,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 19:22:57,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:22:57,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-24 19:22:57,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:22:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:22:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 19:22:57,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:22:57,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:22:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:57,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:57,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:57,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:22:57,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:22:57,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 19:22:57,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:22:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:22:57,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:22:57,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:22:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:22:57,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537432076] [2020-09-24 19:22:57,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:22:57,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:22:57,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008897881] [2020-09-24 19:22:57,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:22:57,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:22:57,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:22:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:22:57,317 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2020-09-24 19:22:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:22:57,567 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-09-24 19:22:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:22:57,568 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 19:22:57,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:22:57,569 INFO L225 Difference]: With dead ends: 137 [2020-09-24 19:22:57,569 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 19:22:57,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:22:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 19:22:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67. [2020-09-24 19:22:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 19:22:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-09-24 19:22:57,585 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36 [2020-09-24 19:22:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:22:57,585 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-09-24 19:22:57,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:22:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-09-24 19:22:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 19:22:57,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:22:57,587 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] [2020-09-24 19:22:57,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:22:57,587 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:22:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:22:57,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2044556103, now seen corresponding path program 1 times [2020-09-24 19:22:57,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:22:57,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613386733] [2020-09-24 19:22:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:22:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:57,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:57,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:57,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 19:22:57,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:22:57,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-09-24 19:22:57,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:57,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:22:57,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:22:57,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 19:22:57,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:22:57,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:22:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:57,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:57,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:57,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:22:57,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:22:57,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 19:22:57,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:57,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:22:57,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:22:57,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:22:57,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:22:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:22:57,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613386733] [2020-09-24 19:22:57,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:22:57,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:22:57,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102815716] [2020-09-24 19:22:57,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:22:57,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:22:57,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:22:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:22:57,910 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states. [2020-09-24 19:22:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:22:58,162 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-09-24 19:22:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:22:58,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 19:22:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:22:58,169 INFO L225 Difference]: With dead ends: 119 [2020-09-24 19:22:58,169 INFO L226 Difference]: Without dead ends: 95 [2020-09-24 19:22:58,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:22:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-24 19:22:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2020-09-24 19:22:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 19:22:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-24 19:22:58,187 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 36 [2020-09-24 19:22:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:22:58,187 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-24 19:22:58,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:22:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-24 19:22:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 19:22:58,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:22:58,192 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:22:58,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:22:58,193 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:22:58,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:22:58,193 INFO L82 PathProgramCache]: Analyzing trace with hash -833752717, now seen corresponding path program 1 times [2020-09-24 19:22:58,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:22:58,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187351578] [2020-09-24 19:22:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:22:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:58,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:58,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:59,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:59,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 19:22:59,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:22:59,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:22:59,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:22:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:22:59,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 19:22:59,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:22:59,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:22:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:59,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:22:59,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:22:59,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:22:59,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:22:59,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:22:59,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:22:59,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:22:59,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:22:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:22:59,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:22:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:22:59,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187351578] [2020-09-24 19:22:59,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:22:59,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:22:59,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216638553] [2020-09-24 19:22:59,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:22:59,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:22:59,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:22:59,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:22:59,431 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2020-09-24 19:22:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:22:59,950 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2020-09-24 19:22:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 19:22:59,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-24 19:22:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:22:59,953 INFO L225 Difference]: With dead ends: 143 [2020-09-24 19:22:59,953 INFO L226 Difference]: Without dead ends: 137 [2020-09-24 19:22:59,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-24 19:22:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-24 19:22:59,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2020-09-24 19:22:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 19:22:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-09-24 19:22:59,963 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 41 [2020-09-24 19:22:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:22:59,964 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-09-24 19:22:59,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:22:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-09-24 19:22:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 19:22:59,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:22:59,966 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:22:59,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:22:59,966 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:22:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:22:59,967 INFO L82 PathProgramCache]: Analyzing trace with hash 865863745, now seen corresponding path program 1 times [2020-09-24 19:22:59,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:22:59,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905495826] [2020-09-24 19:22:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:22:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:22:59,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:00,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:00,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 19:23:00,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:23:00,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-09-24 19:23:00,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:00,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:23:00,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:23:00,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 19:23:00,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:01,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:01,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:01,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:01,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:01,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:23:01,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:01,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905495826] [2020-09-24 19:23:01,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:01,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:23:01,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121274320] [2020-09-24 19:23:01,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:23:01,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:23:01,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:23:01,163 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 11 states. [2020-09-24 19:23:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:01,919 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-09-24 19:23:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 19:23:01,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-24 19:23:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:01,923 INFO L225 Difference]: With dead ends: 159 [2020-09-24 19:23:01,926 INFO L226 Difference]: Without dead ends: 153 [2020-09-24 19:23:01,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-24 19:23:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-24 19:23:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 93. [2020-09-24 19:23:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 19:23:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-09-24 19:23:01,956 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 41 [2020-09-24 19:23:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:01,957 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-09-24 19:23:01,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:23:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-09-24 19:23:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 19:23:01,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:01,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:23:01,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:23:01,966 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2114514645, now seen corresponding path program 1 times [2020-09-24 19:23:01,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:01,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805162438] [2020-09-24 19:23:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:02,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:02,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:03,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:03,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:23:03,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:23:03,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-24 19:23:03,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:03,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:23:03,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:23:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:23:03,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:03,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:03,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:03,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:03,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:03,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:03,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:23:03,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:03,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:03,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805162438] [2020-09-24 19:23:03,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:03,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:23:03,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920017092] [2020-09-24 19:23:03,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:23:03,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:03,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:23:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:23:03,147 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 9 states. [2020-09-24 19:23:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:03,467 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2020-09-24 19:23:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:23:03,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-09-24 19:23:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:03,469 INFO L225 Difference]: With dead ends: 160 [2020-09-24 19:23:03,469 INFO L226 Difference]: Without dead ends: 145 [2020-09-24 19:23:03,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:23:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-24 19:23:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 100. [2020-09-24 19:23:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 19:23:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2020-09-24 19:23:03,478 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 47 [2020-09-24 19:23:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:03,479 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2020-09-24 19:23:03,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:23:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2020-09-24 19:23:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 19:23:03,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:03,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:23:03,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:23:03,481 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1077832869, now seen corresponding path program 1 times [2020-09-24 19:23:03,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:03,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492067645] [2020-09-24 19:23:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:03,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:04,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:04,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:23:04,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:04,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-09-24 19:23:04,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:04,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:23:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 19:23:04,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:04,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:04,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:04,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:04,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:04,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:04,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 19:23:04,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:04,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:04,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492067645] [2020-09-24 19:23:04,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:04,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 19:23:04,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889602655] [2020-09-24 19:23:04,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 19:23:04,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 19:23:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:23:04,315 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 16 states. [2020-09-24 19:23:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:05,514 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2020-09-24 19:23:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 19:23:05,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-24 19:23:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:05,516 INFO L225 Difference]: With dead ends: 165 [2020-09-24 19:23:05,516 INFO L226 Difference]: Without dead ends: 159 [2020-09-24 19:23:05,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 19:23:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-24 19:23:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2020-09-24 19:23:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 19:23:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-09-24 19:23:05,525 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 47 [2020-09-24 19:23:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:05,525 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-09-24 19:23:05,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 19:23:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-09-24 19:23:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 19:23:05,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:05,527 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:23:05,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:23:05,527 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1893706375, now seen corresponding path program 1 times [2020-09-24 19:23:05,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:05,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365173688] [2020-09-24 19:23:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:05,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:06,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:06,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:23:06,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:06,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-09-24 19:23:06,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:06,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:23:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 19:23:06,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:06,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:06,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:06,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:06,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:06,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:06,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:23:06,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:06,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:06,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:06,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:06,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:06,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365173688] [2020-09-24 19:23:06,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:06,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 19:23:06,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984537282] [2020-09-24 19:23:06,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 19:23:06,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:06,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 19:23:06,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:23:06,497 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 16 states. [2020-09-24 19:23:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:07,651 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2020-09-24 19:23:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 19:23:07,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-24 19:23:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:07,654 INFO L225 Difference]: With dead ends: 179 [2020-09-24 19:23:07,654 INFO L226 Difference]: Without dead ends: 173 [2020-09-24 19:23:07,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 19:23:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-24 19:23:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2020-09-24 19:23:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 19:23:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-09-24 19:23:07,667 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47 [2020-09-24 19:23:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:07,667 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-09-24 19:23:07,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 19:23:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-09-24 19:23:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 19:23:07,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:07,669 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:23:07,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:23:07,669 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:07,669 INFO L82 PathProgramCache]: Analyzing trace with hash -857024599, now seen corresponding path program 1 times [2020-09-24 19:23:07,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:07,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825184291] [2020-09-24 19:23:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:07,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:07,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:08,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:08,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:23:08,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:23:08,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-24 19:23:08,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:08,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:23:08,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:23:08,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 19:23:08,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:08,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:08,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:08,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:08,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:08,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:08,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:23:08,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:08,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:08,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825184291] [2020-09-24 19:23:08,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:08,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:23:08,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633433470] [2020-09-24 19:23:08,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:23:08,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:08,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:23:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:23:08,801 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 9 states. [2020-09-24 19:23:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:09,087 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2020-09-24 19:23:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:23:09,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-09-24 19:23:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:09,089 INFO L225 Difference]: With dead ends: 171 [2020-09-24 19:23:09,089 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 19:23:09,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:23:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 19:23:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2020-09-24 19:23:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 19:23:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-24 19:23:09,099 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 47 [2020-09-24 19:23:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:09,100 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-24 19:23:09,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:23:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-24 19:23:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 19:23:09,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:09,102 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:23:09,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:23:09,102 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:09,103 INFO L82 PathProgramCache]: Analyzing trace with hash 294895633, now seen corresponding path program 2 times [2020-09-24 19:23:09,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:09,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896811640] [2020-09-24 19:23:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:09,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:09,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:10,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:10,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 19:23:10,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:23:10,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:23:10,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 19:23:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:10,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 19:23:10,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:10,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:10,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:10,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:10,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:10,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:23:10,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:10,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:10,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896811640] [2020-09-24 19:23:10,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:10,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 19:23:10,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070666408] [2020-09-24 19:23:10,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 19:23:10,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:10,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 19:23:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-24 19:23:10,485 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 18 states. [2020-09-24 19:23:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:11,865 INFO L93 Difference]: Finished difference Result 207 states and 220 transitions. [2020-09-24 19:23:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 19:23:11,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-09-24 19:23:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:11,867 INFO L225 Difference]: With dead ends: 207 [2020-09-24 19:23:11,867 INFO L226 Difference]: Without dead ends: 201 [2020-09-24 19:23:11,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 19:23:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-24 19:23:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 127. [2020-09-24 19:23:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 19:23:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2020-09-24 19:23:11,874 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 52 [2020-09-24 19:23:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:11,875 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2020-09-24 19:23:11,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 19:23:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2020-09-24 19:23:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 19:23:11,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:11,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:23:11,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 19:23:11,877 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1689189507, now seen corresponding path program 1 times [2020-09-24 19:23:11,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:11,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374285721] [2020-09-24 19:23:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:11,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:12,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:12,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:12,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 19:23:12,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:23:12,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-24 19:23:12,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 19:23:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 19:23:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:13,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:13,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:13,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:13,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:23:13,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:13,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:13,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:13,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:13,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:23:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:13,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374285721] [2020-09-24 19:23:13,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:13,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 19:23:13,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082897511] [2020-09-24 19:23:13,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 19:23:13,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:13,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 19:23:13,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-24 19:23:13,302 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand 18 states. [2020-09-24 19:23:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:14,717 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2020-09-24 19:23:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 19:23:14,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-09-24 19:23:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:14,720 INFO L225 Difference]: With dead ends: 233 [2020-09-24 19:23:14,720 INFO L226 Difference]: Without dead ends: 227 [2020-09-24 19:23:14,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 19:23:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-24 19:23:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 139. [2020-09-24 19:23:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-24 19:23:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2020-09-24 19:23:14,728 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 52 [2020-09-24 19:23:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:14,728 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2020-09-24 19:23:14,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 19:23:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2020-09-24 19:23:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 19:23:14,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:14,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:23:14,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 19:23:14,730 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash 219391251, now seen corresponding path program 1 times [2020-09-24 19:23:14,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:14,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562571891] [2020-09-24 19:23:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:14,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:15,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:15,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 19:23:15,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:15,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-09-24 19:23:15,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:15,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:23:15,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:15,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 19:23:15,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:23:15,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:15,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:15,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:15,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:15,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:15,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:23:15,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:15,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562571891] [2020-09-24 19:23:15,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:15,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 19:23:15,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115635676] [2020-09-24 19:23:15,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 19:23:15,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 19:23:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:23:15,573 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand 16 states. [2020-09-24 19:23:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:16,637 INFO L93 Difference]: Finished difference Result 205 states and 218 transitions. [2020-09-24 19:23:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 19:23:16,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 19:23:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:16,640 INFO L225 Difference]: With dead ends: 205 [2020-09-24 19:23:16,641 INFO L226 Difference]: Without dead ends: 190 [2020-09-24 19:23:16,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 19:23:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-24 19:23:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-09-24 19:23:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-24 19:23:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2020-09-24 19:23:16,648 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 53 [2020-09-24 19:23:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:16,649 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2020-09-24 19:23:16,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 19:23:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2020-09-24 19:23:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 19:23:16,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:16,650 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 19:23:16,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 19:23:16,650 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1256073027, now seen corresponding path program 2 times [2020-09-24 19:23:16,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:16,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503984386] [2020-09-24 19:23:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:17,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:17,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 19:23:17,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:17,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-09-24 19:23:17,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:17,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:23:17,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:17,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 19:23:17,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:23:17,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:17,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:17,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:17,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:17,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:17,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:23:17,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:23:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:17,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503984386] [2020-09-24 19:23:17,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:17,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 19:23:17,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55988270] [2020-09-24 19:23:17,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 19:23:17,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 19:23:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:23:17,526 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 16 states. [2020-09-24 19:23:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:18,543 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-09-24 19:23:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 19:23:18,544 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 19:23:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:18,545 INFO L225 Difference]: With dead ends: 187 [2020-09-24 19:23:18,545 INFO L226 Difference]: Without dead ends: 157 [2020-09-24 19:23:18,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-24 19:23:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-24 19:23:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 130. [2020-09-24 19:23:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-24 19:23:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2020-09-24 19:23:18,556 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 53 [2020-09-24 19:23:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:18,558 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2020-09-24 19:23:18,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 19:23:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2020-09-24 19:23:18,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 19:23:18,558 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:18,559 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 19:23:18,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 19:23:18,559 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:18,559 INFO L82 PathProgramCache]: Analyzing trace with hash 164878513, now seen corresponding path program 2 times [2020-09-24 19:23:18,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:18,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726617135] [2020-09-24 19:23:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:18,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:19,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:19,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 19:23:19,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:19,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-09-24 19:23:19,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:19,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:23:19,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:19,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 19:23:19,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:19,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:19,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:19,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:19,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:19,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:23:19,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:19,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:19,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726617135] [2020-09-24 19:23:19,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:19,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 19:23:19,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019324877] [2020-09-24 19:23:19,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 19:23:19,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:19,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 19:23:19,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:23:19,361 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand 16 states. [2020-09-24 19:23:20,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:20,500 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-09-24 19:23:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 19:23:20,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 19:23:20,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:20,502 INFO L225 Difference]: With dead ends: 169 [2020-09-24 19:23:20,502 INFO L226 Difference]: Without dead ends: 143 [2020-09-24 19:23:20,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-24 19:23:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-24 19:23:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2020-09-24 19:23:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-24 19:23:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2020-09-24 19:23:20,509 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 53 [2020-09-24 19:23:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:20,510 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2020-09-24 19:23:20,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 19:23:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2020-09-24 19:23:20,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 19:23:20,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:20,511 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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] [2020-09-24 19:23:20,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 19:23:20,511 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1732440393, now seen corresponding path program 2 times [2020-09-24 19:23:20,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:20,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244219100] [2020-09-24 19:23:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:20,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:21,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:21,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 19:23:21,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:23:21,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-24 19:23:21,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:21,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 19:23:21,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:21,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 19:23:21,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:21,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:21,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:21,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:21,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:21,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:23:21,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:21,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:23:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:21,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244219100] [2020-09-24 19:23:21,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:21,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 19:23:21,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420829457] [2020-09-24 19:23:21,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 19:23:21,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 19:23:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:23:21,860 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand 16 states. [2020-09-24 19:23:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:22,903 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2020-09-24 19:23:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 19:23:22,904 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-09-24 19:23:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:22,906 INFO L225 Difference]: With dead ends: 194 [2020-09-24 19:23:22,906 INFO L226 Difference]: Without dead ends: 179 [2020-09-24 19:23:22,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 19:23:22,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-24 19:23:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 134. [2020-09-24 19:23:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 19:23:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2020-09-24 19:23:22,918 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 58 [2020-09-24 19:23:22,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:22,919 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2020-09-24 19:23:22,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 19:23:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2020-09-24 19:23:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 19:23:22,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:22,921 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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] [2020-09-24 19:23:22,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 19:23:22,921 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:22,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1525845127, now seen corresponding path program 3 times [2020-09-24 19:23:22,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:22,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052327300] [2020-09-24 19:23:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:22,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:23,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:23,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 19:23:23,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:23,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-09-24 19:23:23,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 19:23:23,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:23:23,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 19:23:23,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:24,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:23:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:23:24,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:23:24,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:23:24,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:23:24,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:23:24,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:23:24,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:23:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:23:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:23:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:23:24,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:23:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:23:24,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052327300] [2020-09-24 19:23:24,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:23:24,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 19:23:24,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488065366] [2020-09-24 19:23:24,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 19:23:24,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:23:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 19:23:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-09-24 19:23:24,769 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand 22 states. [2020-09-24 19:23:25,459 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-09-24 19:23:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:23:27,054 INFO L93 Difference]: Finished difference Result 207 states and 220 transitions. [2020-09-24 19:23:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 19:23:27,055 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-09-24 19:23:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:23:27,056 INFO L225 Difference]: With dead ends: 207 [2020-09-24 19:23:27,056 INFO L226 Difference]: Without dead ends: 194 [2020-09-24 19:23:27,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450 [2020-09-24 19:23:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-24 19:23:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 140. [2020-09-24 19:23:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-24 19:23:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2020-09-24 19:23:27,065 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 58 [2020-09-24 19:23:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:23:27,066 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2020-09-24 19:23:27,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 19:23:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2020-09-24 19:23:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 19:23:27,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:23:27,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:23:27,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 19:23:27,067 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:23:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:23:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1049071675, now seen corresponding path program 1 times [2020-09-24 19:23:27,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:23:27,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729758951] [2020-09-24 19:23:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:23:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:23:27,089 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:23:27,089 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:23:27,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 19:23:27,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:23:27 BoogieIcfgContainer [2020-09-24 19:23:27,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:23:27,118 INFO L168 Benchmark]: Toolchain (without parser) took 33266.58 ms. Allocated memory was 137.9 MB in the beginning and 470.8 MB in the end (delta: 332.9 MB). Free memory was 100.1 MB in the beginning and 153.7 MB in the end (delta: -53.6 MB). Peak memory consumption was 279.3 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:27,119 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:23:27,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.84 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 99.4 MB in the beginning and 168.1 MB in the end (delta: -68.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:27,120 INFO L168 Benchmark]: Boogie Preprocessor took 68.57 ms. Allocated memory is still 201.3 MB. Free memory was 168.1 MB in the beginning and 165.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:27,121 INFO L168 Benchmark]: RCFGBuilder took 685.30 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 116.9 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:27,121 INFO L168 Benchmark]: TraceAbstraction took 31787.99 ms. Allocated memory was 201.3 MB in the beginning and 470.8 MB in the end (delta: 269.5 MB). Free memory was 116.2 MB in the beginning and 153.7 MB in the end (delta: -37.5 MB). Peak memory consumption was 232.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:23:27,124 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 714.84 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 99.4 MB in the beginning and 168.1 MB in the end (delta: -68.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.57 ms. Allocated memory is still 201.3 MB. Free memory was 168.1 MB in the beginning and 165.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 685.30 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 116.9 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31787.99 ms. Allocated memory was 201.3 MB in the beginning and 470.8 MB in the end (delta: 269.5 MB). Free memory was 116.2 MB in the beginning and 153.7 MB in the end (delta: -37.5 MB). Peak memory consumption was 232.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31.6s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 14.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1000 SDtfs, 3501 SDslu, 6941 SDs, 0 SdLazy, 5954 SolverSat, 542 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 444 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=13, 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, 17 MinimizatonAttempts, 825 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 831 NumberOfCodeBlocks, 831 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 756 ConstructedInterpolants, 0 QuantifiedInterpolants, 332968 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 28/107 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...