/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:20:43,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:20:43,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:20:43,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:20:43,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:20:43,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:20:43,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:20:43,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:20:43,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:20:43,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:20:43,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:20:43,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:20:43,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:20:43,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:20:43,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:20:43,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:20:43,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:20:43,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:20:43,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:20:43,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:20:43,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:20:43,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:20:43,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:20:43,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:20:43,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:20:43,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:20:43,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:20:43,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:20:43,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:20:43,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:20:43,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:20:43,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:20:43,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:20:43,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:20:43,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:20:43,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:20:43,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:20:43,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:20:43,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:20:43,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:20:43,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:20:43,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 12:20:43,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:20:43,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:20:43,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:20:43,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:20:43,257 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:20:43,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:20:43,257 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:20:43,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:20:43,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:20:43,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:20:43,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:20:43,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:20:43,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:20:43,259 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:20:43,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:20:43,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:20:43,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:20:43,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:20:43,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:20:43,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:20:43,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:20:43,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:20:43,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:20:43,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:20:43,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:20:43,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:20:43,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:20:43,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:20:43,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:20:43,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:20:43,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:20:43,773 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:20:43,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:20:43,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:20:43,780 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:20:43,781 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 12:20:43,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e6ed078e/a496bd3a6e3b4941adee75dddc6f089e/FLAG72ffaaed1 [2020-09-25 12:20:44,470 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:20:44,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 12:20:44,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e6ed078e/a496bd3a6e3b4941adee75dddc6f089e/FLAG72ffaaed1 [2020-09-25 12:20:44,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e6ed078e/a496bd3a6e3b4941adee75dddc6f089e [2020-09-25 12:20:44,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:20:44,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:20:44,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:20:44,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:20:44,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:20:44,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:20:44" (1/1) ... [2020-09-25 12:20:44,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51841e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:44, skipping insertion in model container [2020-09-25 12:20:44,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:20:44" (1/1) ... [2020-09-25 12:20:44,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:20:44,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:20:45,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:20:45,441 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:20:45,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:20:45,550 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:20:45,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45 WrapperNode [2020-09-25 12:20:45,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:20:45,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:20:45,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:20:45,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:20:45,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (1/1) ... [2020-09-25 12:20:45,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (1/1) ... [2020-09-25 12:20:45,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (1/1) ... [2020-09-25 12:20:45,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (1/1) ... [2020-09-25 12:20:45,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (1/1) ... [2020-09-25 12:20:45,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (1/1) ... [2020-09-25 12:20:45,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (1/1) ... [2020-09-25 12:20:45,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:20:45,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:20:45,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:20:45,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:20:45,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:20:45,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:20:45,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:20:45,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 12:20:45,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 12:20:45,708 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 12:20:45,709 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-25 12:20:45,709 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-25 12:20:45,709 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-25 12:20:45,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:20:45,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:20:45,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:20:45,710 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 12:20:45,710 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 12:20:45,710 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 12:20:45,710 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 12:20:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 12:20:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 12:20:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 12:20:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 12:20:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 12:20:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 12:20:45,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 12:20:45,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 12:20:45,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 12:20:45,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 12:20:45,712 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 12:20:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 12:20:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 12:20:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 12:20:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 12:20:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 12:20:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 12:20:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 12:20:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 12:20:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 12:20:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 12:20:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 12:20:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 12:20:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 12:20:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 12:20:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 12:20:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 12:20:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 12:20:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 12:20:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 12:20:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 12:20:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 12:20:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 12:20:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 12:20:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 12:20:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 12:20:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 12:20:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 12:20:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 12:20:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 12:20:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 12:20:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 12:20:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 12:20:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 12:20:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 12:20:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 12:20:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 12:20:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 12:20:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 12:20:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 12:20:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 12:20:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 12:20:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 12:20:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 12:20:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 12:20:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 12:20:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 12:20:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 12:20:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 12:20:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 12:20:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 12:20:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 12:20:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 12:20:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 12:20:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 12:20:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 12:20:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 12:20:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 12:20:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 12:20:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 12:20:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 12:20:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 12:20:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 12:20:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 12:20:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 12:20:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 12:20:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 12:20:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 12:20:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 12:20:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 12:20:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 12:20:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 12:20:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 12:20:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 12:20:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 12:20:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-25 12:20:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 12:20:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 12:20:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-25 12:20:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 12:20:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-25 12:20:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 12:20:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:20:45,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:20:45,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:20:46,099 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 12:20:46,294 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:20:46,294 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 12:20:46,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:20:46 BoogieIcfgContainer [2020-09-25 12:20:46,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:20:46,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:20:46,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:20:46,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:20:46,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:20:44" (1/3) ... [2020-09-25 12:20:46,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51551dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:20:46, skipping insertion in model container [2020-09-25 12:20:46,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:20:45" (2/3) ... [2020-09-25 12:20:46,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51551dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:20:46, skipping insertion in model container [2020-09-25 12:20:46,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:20:46" (3/3) ... [2020-09-25 12:20:46,320 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-09-25 12:20:46,332 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:20:46,343 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:20:46,371 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:20:46,398 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:20:46,398 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:20:46,398 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:20:46,398 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:20:46,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:20:46,399 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:20:46,399 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:20:46,399 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:20:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-25 12:20:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 12:20:46,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:20:46,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:20:46,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:20:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:20:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-09-25 12:20:46,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:20:46,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693355701] [2020-09-25 12:20:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:20:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:46,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:47,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:47,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 12:20:47,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:20:47,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-09-25 12:20:47,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:47,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:47,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:20:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:20:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:20:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 12:20:47,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:20:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:47,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:47,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:20:47,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:47,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 12:20:47,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:47,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:20:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:20:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:20:47,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:47,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 12:20:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:47,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:47,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:47,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:20:47,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:47,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 12:20:47,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:47,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:47,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:20:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:20:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:20:47,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:47,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 12:20:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:47,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:47,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:47,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:20:47,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:47,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 12:20:47,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:47,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:47,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:20:47,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 12:20:47,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:20:47,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:20:47,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693355701] [2020-09-25 12:20:47,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:20:47,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 12:20:47,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654263402] [2020-09-25 12:20:47,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:20:47,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:20:47,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:20:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:20:47,333 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 7 states. [2020-09-25 12:20:47,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:20:47,967 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2020-09-25 12:20:47,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 12:20:47,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-25 12:20:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:20:47,982 INFO L225 Difference]: With dead ends: 186 [2020-09-25 12:20:47,983 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 12:20:47,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:20:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 12:20:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-09-25 12:20:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 12:20:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-09-25 12:20:48,065 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 29 [2020-09-25 12:20:48,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:20:48,065 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-09-25 12:20:48,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:20:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-09-25 12:20:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 12:20:48,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:20:48,069 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:20:48,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:20:48,070 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:20:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:20:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2090477770, now seen corresponding path program 1 times [2020-09-25 12:20:48,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:20:48,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456155714] [2020-09-25 12:20:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:20:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:48,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:48,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:48,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:48,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:48,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:48,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:49,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:50,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:50,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 12:20:50,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:20:50,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2802 [2020-09-25 12:20:50,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:50,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:50,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:20:50,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:20:50,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 12:20:50,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:50,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:20:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:50,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:50,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:20:50,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 12:20:50,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:50,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:20:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:20:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:20:50,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:50,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 12:20:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:50,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:51,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:51,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:20:51,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:51,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 12:20:51,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:51,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:20:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:20:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:20:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:51,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 12:20:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:51,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:51,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:51,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:20:51,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:51,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 12:20:51,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:51,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:51,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:20:51,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 12:20:51,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:20:51,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:20:51,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456155714] [2020-09-25 12:20:51,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:20:51,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 12:20:51,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457536668] [2020-09-25 12:20:51,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:20:51,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:20:51,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:20:51,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:20:51,092 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-09-25 12:20:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:20:51,655 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2020-09-25 12:20:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 12:20:51,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-09-25 12:20:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:20:51,658 INFO L225 Difference]: With dead ends: 106 [2020-09-25 12:20:51,658 INFO L226 Difference]: Without dead ends: 83 [2020-09-25 12:20:51,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-09-25 12:20:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-25 12:20:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2020-09-25 12:20:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 12:20:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-09-25 12:20:51,682 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 41 [2020-09-25 12:20:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:20:51,682 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-09-25 12:20:51,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:20:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-09-25 12:20:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 12:20:51,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:20:51,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:20:51,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:20:51,687 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:20:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:20:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1545332509, now seen corresponding path program 1 times [2020-09-25 12:20:51,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:20:51,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939327378] [2020-09-25 12:20:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:20:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:51,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:51,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:51,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:51,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:51,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:53,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:53,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:55,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:56,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:56,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 12:20:56,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:20:56,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 12:20:56,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:56,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:56,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:20:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:20:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 12:20:56,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:56,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:20:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:56,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:56,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:56,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:20:56,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:56,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 12:20:56,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:56,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:20:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:20:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:20:56,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:56,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 12:20:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:56,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:56,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:56,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 12:20:56,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:56,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 12:20:56,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:56,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:56,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:20:56,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:20:56,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 12:20:56,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:20:56,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-25 12:20:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:56,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:56,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:20:56,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:20:56,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:20:56,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 12:20:56,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:20:56,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:20:56,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:20:56,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 12:20:56,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:20:56,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:20:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:20:56,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939327378] [2020-09-25 12:20:56,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:20:56,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:20:56,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831516559] [2020-09-25 12:20:56,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:20:56,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:20:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:20:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:20:56,956 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 9 states. [2020-09-25 12:20:57,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:20:57,491 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2020-09-25 12:20:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:20:57,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-09-25 12:20:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:20:57,497 INFO L225 Difference]: With dead ends: 115 [2020-09-25 12:20:57,497 INFO L226 Difference]: Without dead ends: 95 [2020-09-25 12:20:57,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:20:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-25 12:20:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-25 12:20:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 12:20:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-09-25 12:20:57,522 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 42 [2020-09-25 12:20:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:20:57,523 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-09-25 12:20:57,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:20:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-09-25 12:20:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 12:20:57,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:20:57,531 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] [2020-09-25 12:20:57,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:20:57,531 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:20:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:20:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1118211705, now seen corresponding path program 1 times [2020-09-25 12:20:57,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:20:57,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972852196] [2020-09-25 12:20:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:20:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:20:57,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:57,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:57,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:57,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:58,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:59,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:20:59,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:02,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:02,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 12:21:02,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 12:21:02,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 12:21:02,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:02,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:02,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:21:02,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:21:02,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 12:21:02,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:02,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:21:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:02,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:02,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:02,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:21:02,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:02,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 12:21:02,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:02,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:02,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 12:21:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:02,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:02,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:02,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 12:21:02,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:02,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-25 12:21:02,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:02,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:21:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:21:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 12:21:02,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:02,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-25 12:21:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:02,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:02,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:02,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:21:02,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:02,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 12:21:02,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:02,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 12:21:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:02,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:21:02,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972852196] [2020-09-25 12:21:02,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:21:02,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:21:02,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560487555] [2020-09-25 12:21:02,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:21:02,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:21:02,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:21:02,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:21:02,796 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 11 states. [2020-09-25 12:21:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:21:03,319 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2020-09-25 12:21:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 12:21:03,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-09-25 12:21:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:21:03,321 INFO L225 Difference]: With dead ends: 115 [2020-09-25 12:21:03,321 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 12:21:03,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-09-25 12:21:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 12:21:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-25 12:21:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-25 12:21:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-09-25 12:21:03,331 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 50 [2020-09-25 12:21:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:21:03,331 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-09-25 12:21:03,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:21:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-09-25 12:21:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 12:21:03,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:21:03,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:21:03,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:21:03,334 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:21:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:21:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash 222909824, now seen corresponding path program 2 times [2020-09-25 12:21:03,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:21:03,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997136797] [2020-09-25 12:21:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:21:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:03,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:03,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:03,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:03,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:03,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:07,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:08,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:08,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 12:21:08,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:21:08,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 12:21:08,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:08,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:21:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:21:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 12:21:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:08,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:21:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:08,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:08,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:08,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:21:08,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:08,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 12:21:08,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:08,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:08,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:08,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:08,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:08,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:08,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 12:21:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:08,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:08,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:08,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 12:21:08,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:08,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-25 12:21:08,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:08,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:21:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:21:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:21:08,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:08,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 12:21:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:08,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:08,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:21:08,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:08,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 12:21:08,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:08,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:08,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:08,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 12:21:08,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 12:21:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:21:08,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997136797] [2020-09-25 12:21:08,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:21:08,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:21:08,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727221609] [2020-09-25 12:21:08,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:21:08,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:21:08,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:21:08,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:21:08,668 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 11 states. [2020-09-25 12:21:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:21:09,069 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-09-25 12:21:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 12:21:09,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-09-25 12:21:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:21:09,071 INFO L225 Difference]: With dead ends: 124 [2020-09-25 12:21:09,071 INFO L226 Difference]: Without dead ends: 104 [2020-09-25 12:21:09,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:21:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-25 12:21:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2020-09-25 12:21:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 12:21:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-09-25 12:21:09,082 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 51 [2020-09-25 12:21:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:21:09,082 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-09-25 12:21:09,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:21:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-09-25 12:21:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:21:09,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:21:09,084 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-09-25 12:21:09,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:21:09,084 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:21:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:21:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2114970198, now seen corresponding path program 2 times [2020-09-25 12:21:09,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:21:09,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281507121] [2020-09-25 12:21:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:21:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:09,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:09,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:09,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:09,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:09,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:10,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:10,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:10,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:11,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:14,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:14,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 12:21:14,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 12:21:14,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 12:21:14,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:14,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:21:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 12:21:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 12:21:14,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:14,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:21:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:14,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:14,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:14,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:21:14,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:14,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 12:21:14,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:14,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:14,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 12:21:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:14,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:14,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:14,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 12:21:14,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:14,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-25 12:21:14,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:14,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:21:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:21:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:21:14,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:14,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 12:21:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:14,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:14,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:14,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:21:14,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:14,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 12:21:14,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:14,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:14,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:14,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 12:21:14,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:14,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 12:21:14,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281507121] [2020-09-25 12:21:14,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:21:14,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 12:21:14,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557018151] [2020-09-25 12:21:14,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 12:21:14,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:21:14,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 12:21:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 12:21:14,402 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 12 states. [2020-09-25 12:21:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:21:14,937 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2020-09-25 12:21:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 12:21:14,938 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-09-25 12:21:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:21:14,939 INFO L225 Difference]: With dead ends: 132 [2020-09-25 12:21:14,940 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 12:21:14,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-25 12:21:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 12:21:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2020-09-25 12:21:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 12:21:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-09-25 12:21:14,951 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 59 [2020-09-25 12:21:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:21:14,952 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-09-25 12:21:14,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 12:21:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-09-25 12:21:14,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 12:21:14,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:21:14,954 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:21:14,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 12:21:14,954 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:21:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:21:14,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1706976893, now seen corresponding path program 3 times [2020-09-25 12:21:14,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:21:14,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494064851] [2020-09-25 12:21:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:21:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:14,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:14,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:15,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:15,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:15,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:19,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:19,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 12:21:19,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 12:21:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4599 [2020-09-25 12:21:19,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:19,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 12:21:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:21:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 12:21:19,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:19,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:21:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:19,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:19,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:19,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:21:19,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:19,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 12:21:19,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:19,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:19,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:19,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:19,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:19,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:19,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 12:21:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:19,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:19,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:19,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 12:21:19,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:19,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-09-25 12:21:19,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:19,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:19,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:21:19,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:21:19,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 12:21:19,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:19,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-25 12:21:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:19,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:19,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:21:19,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:19,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 12:21:19,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:19,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 12:21:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:19,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:21:19,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494064851] [2020-09-25 12:21:19,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:21:19,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 12:21:19,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786353247] [2020-09-25 12:21:19,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 12:21:19,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:21:19,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 12:21:19,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-09-25 12:21:19,954 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 14 states. [2020-09-25 12:21:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:21:20,602 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2020-09-25 12:21:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 12:21:20,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-09-25 12:21:20,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:21:20,609 INFO L225 Difference]: With dead ends: 140 [2020-09-25 12:21:20,610 INFO L226 Difference]: Without dead ends: 120 [2020-09-25 12:21:20,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-09-25 12:21:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-25 12:21:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2020-09-25 12:21:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-25 12:21:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-09-25 12:21:20,629 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 60 [2020-09-25 12:21:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:21:20,629 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-09-25 12:21:20,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 12:21:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-09-25 12:21:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 12:21:20,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:21:20,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:21:20,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 12:21:20,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:21:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:21:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash -994241895, now seen corresponding path program 1 times [2020-09-25 12:21:20,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:21:20,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821480521] [2020-09-25 12:21:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:21:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:20,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:20,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:20,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:21,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:21,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:25,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:25,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 12:21:25,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:21:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 12:21:25,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:25,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:21:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:21:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 12:21:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:25,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:21:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:25,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:25,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:25,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:21:25,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:25,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 12:21:25,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:25,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:25,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:25,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 12:21:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:25,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:25,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:25,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 12:21:25,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:25,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 12:21:25,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:25,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:25,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:21:25,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:21:25,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:21:25,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:25,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 12:21:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:25,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:25,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:25,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:21:25,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:25,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 12:21:25,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:25,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:25,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:25,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 12:21:25,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:25,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:21:25,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821480521] [2020-09-25 12:21:25,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:21:25,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 12:21:25,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941928043] [2020-09-25 12:21:25,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 12:21:25,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:21:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 12:21:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:21:25,953 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 13 states. [2020-09-25 12:21:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:21:26,698 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2020-09-25 12:21:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 12:21:26,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-25 12:21:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:21:26,701 INFO L225 Difference]: With dead ends: 162 [2020-09-25 12:21:26,701 INFO L226 Difference]: Without dead ends: 142 [2020-09-25 12:21:26,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-09-25 12:21:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-25 12:21:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 112. [2020-09-25 12:21:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-25 12:21:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2020-09-25 12:21:26,713 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2020-09-25 12:21:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:21:26,714 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2020-09-25 12:21:26,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 12:21:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2020-09-25 12:21:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 12:21:26,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:21:26,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:21:26,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 12:21:26,719 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:21:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:21:26,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1727079450, now seen corresponding path program 1 times [2020-09-25 12:21:26,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:21:26,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109589558] [2020-09-25 12:21:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:21:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:26,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:27,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:27,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 12:21:27,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:21:27,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-09-25 12:21:27,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:27,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:21:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-25 12:21:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 12:21:27,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:27,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:21:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:27,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:27,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:21:27,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:27,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 12:21:27,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:27,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:27,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:27,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:27,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:27,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:27,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 12:21:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:27,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:27,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:27,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:27,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 12:21:27,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:21:27,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-09-25 12:21:27,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:27,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 12:21:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 12:21:27,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:27,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 12:21:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:27,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:27,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 12:21:27,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:27,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 12:21:27,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:27,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:21:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:21:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:21:27,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:21:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 12:21:27,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109589558] [2020-09-25 12:21:27,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:21:27,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-25 12:21:27,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328169314] [2020-09-25 12:21:27,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:21:27,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:21:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:21:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:21:27,618 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 11 states. [2020-09-25 12:21:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:21:28,130 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-09-25 12:21:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 12:21:28,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-25 12:21:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:21:28,133 INFO L225 Difference]: With dead ends: 126 [2020-09-25 12:21:28,134 INFO L226 Difference]: Without dead ends: 118 [2020-09-25 12:21:28,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:21:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-25 12:21:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-09-25 12:21:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 12:21:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2020-09-25 12:21:28,145 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 62 [2020-09-25 12:21:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:21:28,145 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2020-09-25 12:21:28,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:21:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2020-09-25 12:21:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 12:21:28,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:21:28,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:21:28,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 12:21:28,147 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:21:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:21:28,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1187742581, now seen corresponding path program 1 times [2020-09-25 12:21:28,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:21:28,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677862474] [2020-09-25 12:21:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:21:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:28,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:28,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:29,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:29,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 12:21:29,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:21:29,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-09-25 12:21:29,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:29,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:29,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 12:21:29,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 12:21:29,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 12:21:29,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:29,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:21:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:29,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:29,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:21:29,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:29,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 12:21:29,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:29,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:21:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:21:29,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:29,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 12:21:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:29,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:29,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:29,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:29,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 12:21:29,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:21:29,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-09-25 12:21:29,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:29,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:29,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 12:21:29,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:21:29,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 12:21:29,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:29,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 12:21:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:29,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:29,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:21:29,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 12:21:29,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:21:29,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 12:21:29,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:21:29,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:21:29,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:21:29,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 12:21:29,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 12:21:29,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:21:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 12:21:29,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677862474] [2020-09-25 12:21:29,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:21:29,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 12:21:29,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699764561] [2020-09-25 12:21:29,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 12:21:29,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:21:29,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 12:21:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:21:29,853 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand 15 states. [2020-09-25 12:21:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:21:30,783 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2020-09-25 12:21:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 12:21:30,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-09-25 12:21:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:21:30,785 INFO L225 Difference]: With dead ends: 133 [2020-09-25 12:21:30,785 INFO L226 Difference]: Without dead ends: 125 [2020-09-25 12:21:30,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-09-25 12:21:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-25 12:21:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2020-09-25 12:21:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-25 12:21:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 134 transitions. [2020-09-25 12:21:30,802 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 134 transitions. Word has length 69 [2020-09-25 12:21:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:21:30,803 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 134 transitions. [2020-09-25 12:21:30,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 12:21:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 134 transitions. [2020-09-25 12:21:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 12:21:30,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:21:30,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:21:30,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 12:21:30,809 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:21:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:21:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 979580858, now seen corresponding path program 2 times [2020-09-25 12:21:30,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:21:30,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209320131] [2020-09-25 12:21:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:21:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:21:30,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:30,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:31,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:31,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:31,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:32,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:21:32,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking...