/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:18:07,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:18:07,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:18:07,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:18:07,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:18:07,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:18:07,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:18:07,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:18:07,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:18:07,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:18:07,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:18:07,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:18:07,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:18:07,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:18:07,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:18:07,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:18:07,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:18:07,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:18:07,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:18:07,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:18:07,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:18:07,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:18:07,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:18:07,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:18:07,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:18:07,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:18:07,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:18:07,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:18:07,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:18:07,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 06:18:07,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 06:18:07,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 06:18:07,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 06:18:07,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 06:18:07,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 06:18:07,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 06:18:07,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 06:18:07,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 06:18:07,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:18:07,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:18:07,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:18:07,651 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 [2020-08-22 06:18:07,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:18:07,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:18:07,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:18:07,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:18:07,677 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:18:07,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:18:07,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:18:07,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:18:07,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:18:07,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:18:07,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:18:07,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:18:07,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:18:07,681 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:18:07,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:18:07,681 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:18:07,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:18:07,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:18:07,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:18:07,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:18:07,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:18:07,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:18:07,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:18:07,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:18:07,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:18:07,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:18:07,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:18:07,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:18:07,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:18:07,684 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:18:08,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:18:08,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:18:08,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:18:08,035 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:18:08,035 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:18:08,036 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-22 06:18:08,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bd803494/70b2f214ecc748b998896f28254458e0/FLAG64a50663e [2020-08-22 06:18:08,644 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:18:08,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-22 06:18:08,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bd803494/70b2f214ecc748b998896f28254458e0/FLAG64a50663e [2020-08-22 06:18:08,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6bd803494/70b2f214ecc748b998896f28254458e0 [2020-08-22 06:18:08,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:18:08,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:18:08,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:18:08,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:18:08,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:18:08,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:18:08" (1/1) ... [2020-08-22 06:18:08,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16661b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:08, skipping insertion in model container [2020-08-22 06:18:08,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:18:08" (1/1) ... [2020-08-22 06:18:08,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:18:08,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:18:09,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:18:09,439 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:18:09,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:18:09,539 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:18:09,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09 WrapperNode [2020-08-22 06:18:09,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:18:09,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:18:09,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:18:09,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:18:09,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (1/1) ... [2020-08-22 06:18:09,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (1/1) ... [2020-08-22 06:18:09,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (1/1) ... [2020-08-22 06:18:09,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (1/1) ... [2020-08-22 06:18:09,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (1/1) ... [2020-08-22 06:18:09,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (1/1) ... [2020-08-22 06:18:09,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (1/1) ... [2020-08-22 06:18:09,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:18:09,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:18:09,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:18:09,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:18:09,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (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 [2020-08-22 06:18:09,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:18:09,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:18:09,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:18:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 06:18:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 06:18:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 06:18:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 06:18:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 06:18:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 06:18:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 06:18:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 06:18:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 06:18:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 06:18:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 06:18:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 06:18:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 06:18:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 06:18:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 06:18:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 06:18:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 06:18:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 06:18:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 06:18:09,691 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 06:18:09,691 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 06:18:09,691 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 06:18:09,691 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 06:18:09,691 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 06:18:09,691 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 06:18:09,692 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 06:18:09,692 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 06:18:09,692 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 06:18:09,692 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 06:18:09,692 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 06:18:09,692 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 06:18:09,693 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 06:18:09,693 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 06:18:09,700 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 06:18:09,700 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 06:18:09,700 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 06:18:09,700 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 06:18:09,700 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 06:18:09,701 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 06:18:09,701 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 06:18:09,701 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 06:18:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 06:18:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 06:18:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 06:18:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 06:18:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 06:18:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 06:18:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 06:18:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 06:18:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 06:18:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 06:18:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 06:18:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 06:18:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 06:18:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 06:18:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 06:18:09,708 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 06:18:09,708 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 06:18:09,708 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 06:18:09,708 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 06:18:09,708 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 06:18:09,708 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 06:18:09,708 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 06:18:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 06:18:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 06:18:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 06:18:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 06:18:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 06:18:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 06:18:09,710 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 06:18:09,710 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 06:18:09,710 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 06:18:09,710 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 06:18:09,710 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 06:18:09,710 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 06:18:09,710 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 06:18:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:18:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:18:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 06:18:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 06:18:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 06:18:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 06:18:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:18:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:18:10,393 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:18:10,393 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-22 06:18:10,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:18:10 BoogieIcfgContainer [2020-08-22 06:18:10,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:18:10,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:18:10,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:18:10,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:18:10,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:18:08" (1/3) ... [2020-08-22 06:18:10,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dbdb38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:18:10, skipping insertion in model container [2020-08-22 06:18:10,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:18:09" (2/3) ... [2020-08-22 06:18:10,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dbdb38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:18:10, skipping insertion in model container [2020-08-22 06:18:10,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:18:10" (3/3) ... [2020-08-22 06:18:10,414 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-22 06:18:10,425 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:18:10,435 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-22 06:18:10,455 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-22 06:18:10,493 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:18:10,493 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:18:10,494 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:18:10,494 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:18:10,494 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:18:10,494 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:18:10,495 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:18:10,496 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:18:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-22 06:18:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-22 06:18:10,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:10,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:18:10,553 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-22 06:18:10,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:10,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922304805] [2020-08-22 06:18:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:10,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:10,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922304805] [2020-08-22 06:18:10,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:10,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:18:10,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337760189] [2020-08-22 06:18:10,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:18:10,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:10,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:18:10,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:10,904 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-22 06:18:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:11,239 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-22 06:18:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:18:11,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-22 06:18:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:11,252 INFO L225 Difference]: With dead ends: 186 [2020-08-22 06:18:11,252 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 06:18:11,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 06:18:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-22 06:18:11,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 06:18:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-22 06:18:11,306 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-22 06:18:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:11,307 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-22 06:18:11,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:18:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-22 06:18:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 06:18:11,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:11,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:18:11,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:18:11,309 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-22 06:18:11,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:11,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71785935] [2020-08-22 06:18:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:11,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:11,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71785935] [2020-08-22 06:18:11,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:11,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:18:11,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414830639] [2020-08-22 06:18:11,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:18:11,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:11,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:18:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:11,387 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-22 06:18:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:11,567 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-22 06:18:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:18:11,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 06:18:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:11,570 INFO L225 Difference]: With dead ends: 84 [2020-08-22 06:18:11,570 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 06:18:11,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 06:18:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-22 06:18:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 06:18:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-22 06:18:11,582 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-22 06:18:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:11,583 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-22 06:18:11,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:18:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-22 06:18:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 06:18:11,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:11,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:18:11,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:18:11,584 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-22 06:18:11,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:11,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010554205] [2020-08-22 06:18:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:11,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:11,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010554205] [2020-08-22 06:18:11,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:11,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:18:11,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36885929] [2020-08-22 06:18:11,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:18:11,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:11,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:18:11,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:18:11,672 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-22 06:18:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:11,918 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-22 06:18:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:18:11,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 06:18:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:11,921 INFO L225 Difference]: With dead ends: 138 [2020-08-22 06:18:11,921 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 06:18:11,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:18:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 06:18:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-22 06:18:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 06:18:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-22 06:18:11,932 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-22 06:18:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:11,932 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-22 06:18:11,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:18:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-22 06:18:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 06:18:11,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:11,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:18:11,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:18:11,934 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-22 06:18:11,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:11,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859687102] [2020-08-22 06:18:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:12,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:12,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859687102] [2020-08-22 06:18:12,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:12,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:18:12,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133633161] [2020-08-22 06:18:12,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:18:12,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:12,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:18:12,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:18:12,029 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-22 06:18:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:12,251 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-22 06:18:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:18:12,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 06:18:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:12,253 INFO L225 Difference]: With dead ends: 84 [2020-08-22 06:18:12,253 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 06:18:12,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:18:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 06:18:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-22 06:18:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 06:18:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-22 06:18:12,274 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-22 06:18:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:12,274 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-22 06:18:12,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:18:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-22 06:18:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 06:18:12,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:12,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:18:12,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:18:12,277 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-22 06:18:12,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:12,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721152183] [2020-08-22 06:18:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:12,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:12,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721152183] [2020-08-22 06:18:12,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:12,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:18:12,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919268151] [2020-08-22 06:18:12,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:18:12,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:18:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:18:12,431 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-22 06:18:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:12,638 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-22 06:18:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:18:12,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-22 06:18:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:12,640 INFO L225 Difference]: With dead ends: 199 [2020-08-22 06:18:12,640 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 06:18:12,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:18:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 06:18:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-22 06:18:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 06:18:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-22 06:18:12,654 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-22 06:18:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:12,654 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-22 06:18:12,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:18:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-22 06:18:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 06:18:12,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:12,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:18:12,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:18:12,656 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:12,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-22 06:18:12,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:12,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493236239] [2020-08-22 06:18:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:12,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:12,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493236239] [2020-08-22 06:18:12,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:12,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 06:18:12,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330843443] [2020-08-22 06:18:12,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:18:12,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:12,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:18:12,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:18:12,733 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-22 06:18:12,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:12,945 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-22 06:18:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:18:12,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 06:18:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:12,947 INFO L225 Difference]: With dead ends: 126 [2020-08-22 06:18:12,947 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 06:18:12,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:18:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 06:18:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-22 06:18:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 06:18:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-22 06:18:12,955 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-22 06:18:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:12,956 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-22 06:18:12,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:18:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-22 06:18:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 06:18:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:12,958 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] [2020-08-22 06:18:12,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:18:12,959 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-22 06:18:12,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:12,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066941933] [2020-08-22 06:18:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:13,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066941933] [2020-08-22 06:18:13,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 06:18:13,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495825652] [2020-08-22 06:18:13,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:18:13,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:13,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:18:13,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:18:13,055 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-22 06:18:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:13,234 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-22 06:18:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:18:13,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 06:18:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:13,236 INFO L225 Difference]: With dead ends: 136 [2020-08-22 06:18:13,236 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 06:18:13,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:18:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 06:18:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-22 06:18:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 06:18:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-22 06:18:13,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-22 06:18:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:13,243 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-22 06:18:13,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:18:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-22 06:18:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 06:18:13,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:13,244 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] [2020-08-22 06:18:13,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:18:13,245 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-22 06:18:13,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:13,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359530004] [2020-08-22 06:18:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:13,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359530004] [2020-08-22 06:18:13,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:13,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:18:13,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314200874] [2020-08-22 06:18:13,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:18:13,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:18:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:13,299 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-22 06:18:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:13,432 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-22 06:18:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:18:13,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-22 06:18:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:13,434 INFO L225 Difference]: With dead ends: 141 [2020-08-22 06:18:13,434 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 06:18:13,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:13,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 06:18:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-22 06:18:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 06:18:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-22 06:18:13,440 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-22 06:18:13,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:13,440 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-22 06:18:13,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:18:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-22 06:18:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 06:18:13,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:13,442 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] [2020-08-22 06:18:13,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:18:13,442 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:13,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-22 06:18:13,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:13,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922723627] [2020-08-22 06:18:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:13,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922723627] [2020-08-22 06:18:13,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:13,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:18:13,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052969495] [2020-08-22 06:18:13,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:18:13,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:18:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:13,483 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-22 06:18:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:13,595 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-22 06:18:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:18:13,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-22 06:18:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:13,596 INFO L225 Difference]: With dead ends: 79 [2020-08-22 06:18:13,597 INFO L226 Difference]: Without dead ends: 77 [2020-08-22 06:18:13,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-22 06:18:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-22 06:18:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 06:18:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-22 06:18:13,604 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-22 06:18:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:13,604 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-22 06:18:13,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:18:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-22 06:18:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:18:13,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:13,605 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] [2020-08-22 06:18:13,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:18:13,606 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:13,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-22 06:18:13,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:13,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280480667] [2020-08-22 06:18:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:13,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280480667] [2020-08-22 06:18:13,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:13,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:18:13,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932000845] [2020-08-22 06:18:13,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:18:13,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:18:13,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:18:13,658 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-22 06:18:13,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:13,800 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-22 06:18:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:18:13,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 06:18:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:13,801 INFO L225 Difference]: With dead ends: 78 [2020-08-22 06:18:13,801 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 06:18:13,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:18:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 06:18:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 06:18:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 06:18:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-22 06:18:13,810 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-22 06:18:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:13,811 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-22 06:18:13,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:18:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-22 06:18:13,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 06:18:13,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:13,818 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] [2020-08-22 06:18:13,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:18:13,818 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-22 06:18:13,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:13,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694058294] [2020-08-22 06:18:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:13,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694058294] [2020-08-22 06:18:13,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:13,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 06:18:13,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751982564] [2020-08-22 06:18:13,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:18:13,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:18:13,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:18:13,924 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-22 06:18:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:14,236 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-22 06:18:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:18:14,238 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-22 06:18:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:14,239 INFO L225 Difference]: With dead ends: 179 [2020-08-22 06:18:14,239 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 06:18:14,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:18:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 06:18:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-22 06:18:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 06:18:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-22 06:18:14,246 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-22 06:18:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:14,246 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-22 06:18:14,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:18:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-22 06:18:14,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 06:18:14,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:14,248 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] [2020-08-22 06:18:14,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:18:14,248 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:14,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-22 06:18:14,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:14,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716716684] [2020-08-22 06:18:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:14,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:18:14,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716716684] [2020-08-22 06:18:14,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:14,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 06:18:14,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747728019] [2020-08-22 06:18:14,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:18:14,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:18:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:18:14,566 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-22 06:18:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:15,345 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-22 06:18:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 06:18:15,345 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-22 06:18:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:15,349 INFO L225 Difference]: With dead ends: 182 [2020-08-22 06:18:15,350 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 06:18:15,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-22 06:18:15,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 06:18:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-22 06:18:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 06:18:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-22 06:18:15,359 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-22 06:18:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:15,360 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-22 06:18:15,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:18:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-22 06:18:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 06:18:15,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:15,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:18:15,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:18:15,361 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-22 06:18:15,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:15,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449653916] [2020-08-22 06:18:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:15,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 06:18:15,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449653916] [2020-08-22 06:18:15,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:15,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:18:15,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012838049] [2020-08-22 06:18:15,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:18:15,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:15,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:18:15,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:18:15,421 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-22 06:18:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:15,640 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-22 06:18:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:18:15,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 06:18:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:15,641 INFO L225 Difference]: With dead ends: 150 [2020-08-22 06:18:15,642 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 06:18:15,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:18:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 06:18:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-22 06:18:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 06:18:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-22 06:18:15,650 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-22 06:18:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:15,651 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-22 06:18:15,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:18:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-22 06:18:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 06:18:15,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:15,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:18:15,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 06:18:15,652 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-22 06:18:15,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:15,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179183037] [2020-08-22 06:18:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:15,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:18:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:18:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 06:18:15,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179183037] [2020-08-22 06:18:15,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:18:15,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:18:15,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137797035] [2020-08-22 06:18:15,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:18:15,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:18:15,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:18:15,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:15,688 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-22 06:18:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:18:15,825 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-22 06:18:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:18:15,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-22 06:18:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:18:15,827 INFO L225 Difference]: With dead ends: 124 [2020-08-22 06:18:15,827 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 06:18:15,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:18:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 06:18:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-22 06:18:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 06:18:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-22 06:18:15,835 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-22 06:18:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:18:15,836 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-22 06:18:15,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:18:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-22 06:18:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 06:18:15,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:18:15,837 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] [2020-08-22 06:18:15,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 06:18:15,838 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:18:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:18:15,838 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-22 06:18:15,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:18:15,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823287913] [2020-08-22 06:18:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:18:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 06:18:15,852 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 06:18:15,852 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 06:18:15,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 06:18:15,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:18:15 BoogieIcfgContainer [2020-08-22 06:18:15,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:18:15,880 INFO L168 Benchmark]: Toolchain (without parser) took 6986.10 ms. Allocated memory was 147.3 MB in the beginning and 283.1 MB in the end (delta: 135.8 MB). Free memory was 102.1 MB in the beginning and 186.8 MB in the end (delta: -84.7 MB). Peak memory consumption was 51.1 MB. Max. memory is 7.1 GB. [2020-08-22 06:18:15,880 INFO L168 Benchmark]: CDTParser took 0.86 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 06:18:15,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.47 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 101.9 MB in the beginning and 170.4 MB in the end (delta: -68.5 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-08-22 06:18:15,882 INFO L168 Benchmark]: Boogie Preprocessor took 76.24 ms. Allocated memory is still 203.9 MB. Free memory was 170.4 MB in the beginning and 167.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-22 06:18:15,883 INFO L168 Benchmark]: RCFGBuilder took 781.53 ms. Allocated memory is still 203.9 MB. Free memory was 166.7 MB in the beginning and 110.7 MB in the end (delta: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-08-22 06:18:15,884 INFO L168 Benchmark]: TraceAbstraction took 5475.14 ms. Allocated memory was 203.9 MB in the beginning and 283.1 MB in the end (delta: 79.2 MB). Free memory was 110.7 MB in the beginning and 186.8 MB in the end (delta: -76.1 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-22 06:18:15,887 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 646.47 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 101.9 MB in the beginning and 170.4 MB in the end (delta: -68.5 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.24 ms. Allocated memory is still 203.9 MB. Free memory was 170.4 MB in the beginning and 167.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 781.53 ms. Allocated memory is still 203.9 MB. Free memory was 166.7 MB in the beginning and 110.7 MB in the end (delta: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5475.14 ms. Allocated memory was 203.9 MB in the beginning and 283.1 MB in the end (delta: 79.2 MB). Free memory was 110.7 MB in the beginning and 186.8 MB in the end (delta: -76.1 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...