/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:17:05,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:17:05,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:17:05,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:17:05,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:17:05,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:17:05,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:17:05,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:17:05,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:17:05,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:17:05,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:17:05,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:17:05,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:17:05,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:17:05,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:17:05,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:17:05,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:17:05,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:17:05,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:17:05,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:17:05,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:17:05,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:17:05,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:17:05,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:17:05,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:17:05,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:17:05,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:17:05,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:17:05,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:17:05,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:17:05,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:17:05,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:17:05,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:17:05,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:17:05,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:17:05,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:17:05,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:17:05,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:17:05,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:17:05,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:17:05,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:17:05,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:17:05,763 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:17:05,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:17:05,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:17:05,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:17:05,767 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:17:05,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:17:05,767 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:17:05,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:17:05,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:17:05,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:17:05,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:17:05,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:17:05,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:17:05,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:17:05,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:17:05,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:17:05,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:17:05,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:17:05,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:17:05,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:17:05,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:17:05,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:17:05,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:17:05,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:17:05,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:17:05,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:17:05,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:05,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:17:05,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:17:05,773 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:17:06,207 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:17:06,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:17:06,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:17:06,248 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:17:06,249 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:17:06,253 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 11:17:06,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262d2c6f9/6064b69b34df42da92146ab3d45ba5c3/FLAG09e8d9573 [2020-07-21 11:17:07,386 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:17:07,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 11:17:07,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262d2c6f9/6064b69b34df42da92146ab3d45ba5c3/FLAG09e8d9573 [2020-07-21 11:17:07,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262d2c6f9/6064b69b34df42da92146ab3d45ba5c3 [2020-07-21 11:17:07,459 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:17:07,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:17:07,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:17:07,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:17:07,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:17:07,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:17:07" (1/1) ... [2020-07-21 11:17:07,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@130238cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:07, skipping insertion in model container [2020-07-21 11:17:07,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:17:07" (1/1) ... [2020-07-21 11:17:07,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:17:07,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:17:08,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:17:08,236 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:17:08,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:17:08,397 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:17:08,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08 WrapperNode [2020-07-21 11:17:08,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:17:08,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:17:08,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:17:08,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:17:08,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (1/1) ... [2020-07-21 11:17:08,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (1/1) ... [2020-07-21 11:17:08,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (1/1) ... [2020-07-21 11:17:08,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (1/1) ... [2020-07-21 11:17:08,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (1/1) ... [2020-07-21 11:17:08,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (1/1) ... [2020-07-21 11:17:08,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (1/1) ... [2020-07-21 11:17:08,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:17:08,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:17:08,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:17:08,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:17:08,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 11:17:08,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:17:08,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:17:08,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:17:08,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 11:17:08,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 11:17:08,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 11:17:08,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 11:17:08,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 11:17:08,604 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-21 11:17:08,605 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-21 11:17:08,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:17:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:17:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:17:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:17:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:17:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:17:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:17:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:17:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:17:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:17:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:17:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:17:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:17:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:17:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:17:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:17:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:17:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:17:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:17:08,609 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 11:17:08,609 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 11:17:08,609 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 11:17:08,609 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 11:17:08,609 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 11:17:08,609 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:17:08,610 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:17:08,610 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:17:08,610 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:17:08,610 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:17:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:17:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:17:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:17:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:17:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:17:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:17:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:17:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:17:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:17:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:17:08,613 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:17:08,613 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:17:08,613 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:17:08,613 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:17:08,613 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:17:08,613 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:17:08,614 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:17:08,614 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:17:08,614 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:17:08,614 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:17:08,614 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:17:08,614 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:17:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:17:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:17:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:17:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:17:08,615 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:17:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:17:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:17:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:17:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:17:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:17:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:17:08,617 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:17:08,617 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:17:08,617 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:17:08,617 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 11:17:08,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:17:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:17:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 11:17:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:17:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:17:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 11:17:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:17:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:17:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:17:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:17:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:17:08,619 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:17:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:17:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:17:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:17:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:17:08,620 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:17:08,621 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:17:08,621 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:17:08,621 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:17:08,621 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:17:08,621 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:17:08,622 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:17:08,622 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:17:08,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:17:08,622 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:17:08,622 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:17:08,622 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:17:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:17:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:17:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:17:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:17:08,623 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:17:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:17:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:17:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:17:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:17:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:17:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:17:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:17:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:17:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:17:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:17:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:17:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-21 11:17:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:17:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:17:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-21 11:17:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:17:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:17:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:17:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:17:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:17:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:17:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:17:09,492 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:17:09,493 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 11:17:09,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:17:09 BoogieIcfgContainer [2020-07-21 11:17:09,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:17:09,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:17:09,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:17:09,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:17:09,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:17:07" (1/3) ... [2020-07-21 11:17:09,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6cd8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:17:09, skipping insertion in model container [2020-07-21 11:17:09,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:17:08" (2/3) ... [2020-07-21 11:17:09,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6cd8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:17:09, skipping insertion in model container [2020-07-21 11:17:09,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:17:09" (3/3) ... [2020-07-21 11:17:09,518 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-21 11:17:09,537 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:17:09,550 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:17:09,568 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:17:09,601 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:17:09,601 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:17:09,601 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:17:09,602 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:17:09,602 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:17:09,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:17:09,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:17:09,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:17:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-21 11:17:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 11:17:09,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:09,652 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:09,653 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:09,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-21 11:17:09,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:09,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149617400] [2020-07-21 11:17:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:10,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:17:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 11:17:10,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:17:10,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149617400] [2020-07-21 11:17:10,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:17:10,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:17:10,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317673322] [2020-07-21 11:17:10,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:17:10,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:17:10,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:17:10,331 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-07-21 11:17:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:17:10,413 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-21 11:17:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:17:10,417 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2020-07-21 11:17:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:17:10,450 INFO L225 Difference]: With dead ends: 58 [2020-07-21 11:17:10,451 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 11:17:10,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:17:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 11:17:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 11:17:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 11:17:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 11:17:10,567 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 45 [2020-07-21 11:17:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:17:10,572 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 11:17:10,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:17:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 11:17:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 11:17:10,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:10,578 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:10,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:10,794 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1842115760, now seen corresponding path program 1 times [2020-07-21 11:17:10,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:10,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648903723] [2020-07-21 11:17:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:17:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:17:11,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:17:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 11:17:11,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648903723] [2020-07-21 11:17:11,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:17:11,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-21 11:17:11,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465495703] [2020-07-21 11:17:11,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:17:11,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:17:11,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:17:11,295 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-07-21 11:17:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:17:11,642 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2020-07-21 11:17:11,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:17:11,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-07-21 11:17:11,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:17:11,645 INFO L225 Difference]: With dead ends: 73 [2020-07-21 11:17:11,646 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 11:17:11,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:17:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 11:17:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-21 11:17:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 11:17:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-21 11:17:11,666 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 47 [2020-07-21 11:17:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:17:11,667 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-21 11:17:11,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:17:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-21 11:17:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 11:17:11,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:11,670 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:11,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:11,885 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:11,886 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-21 11:17:11,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:11,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567714688] [2020-07-21 11:17:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:12,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 11:17:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:12,341 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 11:17:12,342 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 11:17:12,343 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:12,354 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:12,364 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:12,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:7 [2020-07-21 11:17:12,463 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:17:12,479 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:17:12,549 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:17:12,654 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:17:12,659 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:12,664 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:12,666 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:12,666 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:1 [2020-07-21 11:17:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 11:17:12,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:17:12,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567714688] [2020-07-21 11:17:12,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:17:12,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-21 11:17:12,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413498284] [2020-07-21 11:17:12,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 11:17:12,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:12,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 11:17:12,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:17:12,703 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 10 states. [2020-07-21 11:17:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:17:13,222 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-07-21 11:17:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:17:13,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-07-21 11:17:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:17:13,228 INFO L225 Difference]: With dead ends: 56 [2020-07-21 11:17:13,229 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 11:17:13,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-07-21 11:17:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 11:17:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-07-21 11:17:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 11:17:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 11:17:13,243 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-21 11:17:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:17:13,244 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 11:17:13,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 11:17:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 11:17:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 11:17:13,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:13,247 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:13,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:13,465 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:13,467 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-21 11:17:13,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:13,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197144570] [2020-07-21 11:17:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:13,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 11:17:13,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 11:17:13,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:17:13,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197144570] [2020-07-21 11:17:13,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:17:13,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:17:13,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577511356] [2020-07-21 11:17:13,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:17:13,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:13,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:17:13,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:17:13,755 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-21 11:17:13,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:17:13,961 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 11:17:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:17:13,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-21 11:17:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:17:13,969 INFO L225 Difference]: With dead ends: 54 [2020-07-21 11:17:13,970 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 11:17:13,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:17:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 11:17:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 11:17:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 11:17:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-21 11:17:13,996 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-21 11:17:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:17:13,999 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-21 11:17:14,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:17:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-21 11:17:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 11:17:14,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:14,007 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:14,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:14,223 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-21 11:17:14,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:14,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791385752] [2020-07-21 11:17:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:14,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-21 11:17:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:14,469 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 11:17:14,469 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:14,478 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:14,480 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:14,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 11:17:14,519 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 11:17:14,520 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 11:17:14,520 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:14,528 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:14,529 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:14,529 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:13 [2020-07-21 11:17:14,698 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 11:17:14,699 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:14,719 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:14,729 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 11:17:14,730 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:14,757 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:14,760 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:14,760 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:46 [2020-07-21 11:17:15,564 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:17:16,332 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:17:16,383 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:16,384 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2020-07-21 11:17:16,386 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:16,410 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:16,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:17:16,427 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2020-07-21 11:17:16,429 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:16,441 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:16,443 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:16,445 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2020-07-21 11:17:16,659 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2020-07-21 11:17:16,664 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:16,683 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:16,689 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-07-21 11:17:16,691 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:16,705 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:16,706 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:16,707 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:7 [2020-07-21 11:17:16,759 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:17:16,760 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:16,765 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:16,766 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:16,766 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 11:17:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 11:17:16,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:17:16,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:17:17,524 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:17,536 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:17,539 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:17,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2020-07-21 11:17:17,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791385752] [2020-07-21 11:17:17,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 11:17:17,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 11:17:17,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311561760] [2020-07-21 11:17:17,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:17:17,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:17,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:17:17,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:17:17,678 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 18 states. [2020-07-21 11:17:18,868 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 11:17:21,648 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:17:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:17:23,027 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-07-21 11:17:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:17:23,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-21 11:17:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:17:23,031 INFO L225 Difference]: With dead ends: 55 [2020-07-21 11:17:23,032 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 11:17:23,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 11:17:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 11:17:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-21 11:17:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 11:17:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-21 11:17:23,044 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-21 11:17:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:17:23,045 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-21 11:17:23,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:17:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-21 11:17:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 11:17:23,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:23,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:23,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:23,261 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-21 11:17:23,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:23,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767718388] [2020-07-21 11:17:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:23,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 101 conjunts are in the unsatisfiable core [2020-07-21 11:17:23,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:23,452 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 11:17:23,452 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:23,460 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:23,461 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:23,462 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 11:17:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:17:23,492 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 11:17:23,493 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:23,508 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:23,510 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:23,511 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-21 11:17:23,651 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 11:17:23,652 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:23,674 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:23,684 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 11:17:23,685 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:23,709 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:23,712 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:23,713 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:55 [2020-07-21 11:17:24,873 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:17:25,727 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:17:25,773 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:25,774 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 69 [2020-07-21 11:17:25,777 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:25,845 INFO L624 ElimStorePlain]: treesize reduction 32, result has 69.8 percent of original size [2020-07-21 11:17:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:17:25,858 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2020-07-21 11:17:25,860 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:25,889 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:25,891 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:25,892 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:52 [2020-07-21 11:17:26,109 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:26,165 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:26,170 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:26,207 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:26,210 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:26,231 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:26,237 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:26,266 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:26,268 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:26,269 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-21 11:17:37,799 WARN L193 SmtUtils]: Spent 5.44 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:17:45,897 WARN L193 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:17:45,955 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:45,956 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-07-21 11:17:45,959 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:45,999 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:46,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:17:46,023 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2020-07-21 11:17:46,025 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:46,062 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:17:46,072 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 39 [2020-07-21 11:17:46,075 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:46,131 INFO L624 ElimStorePlain]: treesize reduction 4, result has 95.1 percent of original size [2020-07-21 11:17:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:17:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:17:46,144 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2020-07-21 11:17:46,146 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:46,182 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:46,184 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:46,185 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:103, output treesize:77 [2020-07-21 11:17:46,533 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:17:46,535 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:17:46,665 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:17:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:17:46,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:17:47,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:17:47,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:17:47,795 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:17:47,919 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:17:48,122 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 11:17:48,276 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 11:17:48,301 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.offset_71|, |v_#memory_$Pointer$.base_71|], 2=[|v_#memory_int_67|], 3=[|v_#memory_$Pointer$.offset_70|, |v_#memory_$Pointer$.base_70|]} [2020-07-21 11:17:48,308 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:48,364 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:48,370 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:48,399 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:48,404 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:48,429 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:48,441 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:48,470 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:48,473 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:48,484 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:48,486 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-21 11:17:48,486 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:125, output treesize:59 [2020-07-21 11:17:48,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767718388] [2020-07-21 11:17:48,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 11:17:48,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-21 11:17:48,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932300540] [2020-07-21 11:17:48,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:17:48,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:17:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=782, Unknown=4, NotChecked=0, Total=870 [2020-07-21 11:17:48,647 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 21 states. [2020-07-21 11:18:04,843 WARN L193 SmtUtils]: Spent 11.79 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-07-21 11:18:17,234 WARN L193 SmtUtils]: Spent 12.16 s on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-07-21 11:18:29,426 WARN L193 SmtUtils]: Spent 12.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-07-21 11:18:35,858 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-07-21 11:18:48,214 WARN L193 SmtUtils]: Spent 12.16 s on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-07-21 11:18:50,647 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-07-21 11:18:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:18:54,471 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-07-21 11:18:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 11:18:54,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-07-21 11:18:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:18:54,474 INFO L225 Difference]: With dead ends: 65 [2020-07-21 11:18:54,474 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 11:18:54,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 79.2s TimeCoverageRelationStatistics Valid=212, Invalid=1761, Unknown=7, NotChecked=0, Total=1980 [2020-07-21 11:18:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 11:18:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-07-21 11:18:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 11:18:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-07-21 11:18:54,493 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 53 [2020-07-21 11:18:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:18:54,494 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-07-21 11:18:54,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:18:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-07-21 11:18:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 11:18:54,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:18:54,496 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:18:54,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:18:54,711 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:18:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:18:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 1 times [2020-07-21 11:18:54,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:18:54,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112895019] [2020-07-21 11:18:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:18:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:18:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-21 11:18:54,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:18:54,959 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:18:54,985 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 11:18:54,989 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:18:55,001 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 11:18:55,002 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:18:55,026 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:18:55,028 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 11:18:55,029 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:23 [2020-07-21 11:18:55,154 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_73|], 2=[|v_#memory_$Pointer$.base_74|, |v_#memory_$Pointer$.base_76|]} [2020-07-21 11:18:55,168 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 11:18:55,170 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:18:55,183 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 11:18:55,183 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:18:55,259 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:18:55,266 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:18:55,274 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:18:55,344 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:18:55,350 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 11:18:55,355 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 11:18:55,395 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:18:55,397 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-07-21 11:18:55,398 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:129, output treesize:67 [2020-07-21 11:18:57,922 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 11:19:00,941 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 11:19:00,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:19:00,966 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 11:19:00,980 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:19:00,981 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 44 [2020-07-21 11:19:00,983 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:19:00,985 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:19:01,028 INFO L624 ElimStorePlain]: treesize reduction 16, result has 71.9 percent of original size [2020-07-21 11:19:01,029 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:19:01,030 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-07-21 11:19:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:19:01,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:19:01,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:19:01,892 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_89|], 3=[|v_#memory_$Pointer$.base_88|]} [2020-07-21 11:19:01,897 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:19:01,902 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:19:01,931 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:19:01,937 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:19:01,941 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:19:01,968 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:19:01,971 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-07-21 11:19:01,971 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:109, output treesize:51 [2020-07-21 11:19:09,687 WARN L193 SmtUtils]: Spent 3.71 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 11:19:09,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112895019] [2020-07-21 11:19:09,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 11:19:09,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 11:19:09,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747657740] [2020-07-21 11:19:09,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:19:09,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:19:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:19:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=498, Unknown=1, NotChecked=0, Total=600 [2020-07-21 11:19:09,691 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 18 states. [2020-07-21 11:19:15,610 WARN L193 SmtUtils]: Spent 3.72 s on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2020-07-21 11:19:23,407 WARN L193 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-07-21 11:19:25,770 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-07-21 11:19:28,148 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-07-21 11:19:33,523 WARN L193 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-07-21 11:19:48,095 WARN L193 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-07-21 11:19:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:19:48,638 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-07-21 11:19:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 11:19:48,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-21 11:19:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:19:48,642 INFO L225 Difference]: With dead ends: 77 [2020-07-21 11:19:48,642 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 11:19:48,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=381, Invalid=1684, Unknown=5, NotChecked=0, Total=2070 [2020-07-21 11:19:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 11:19:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-07-21 11:19:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 11:19:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-07-21 11:19:48,664 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 53 [2020-07-21 11:19:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:19:48,664 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-07-21 11:19:48,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:19:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-07-21 11:19:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 11:19:48,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:19:48,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:19:48,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:19:48,899 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:19:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:19:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-21 11:19:48,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:19:48,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852074628] [2020-07-21 11:19:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:19:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:19:49,311 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:19:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:19:49,410 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:19:49,478 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:19:49,479 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:19:49,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:19:49,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:19:49 BoogieIcfgContainer [2020-07-21 11:19:49,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:19:49,766 INFO L168 Benchmark]: Toolchain (without parser) took 162304.95 ms. Allocated memory was 133.7 MB in the beginning and 370.7 MB in the end (delta: 237.0 MB). Free memory was 96.8 MB in the beginning and 285.7 MB in the end (delta: -188.9 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:19:49,766 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 133.7 MB. Free memory was 116.7 MB in the beginning and 116.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 11:19:49,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 933.06 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 96.4 MB in the beginning and 166.6 MB in the end (delta: -70.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:19:49,767 INFO L168 Benchmark]: Boogie Preprocessor took 93.84 ms. Allocated memory is still 200.8 MB. Free memory was 166.6 MB in the beginning and 163.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:19:49,768 INFO L168 Benchmark]: RCFGBuilder took 1007.48 ms. Allocated memory is still 200.8 MB. Free memory was 163.7 MB in the beginning and 118.9 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:19:49,769 INFO L168 Benchmark]: TraceAbstraction took 160259.76 ms. Allocated memory was 200.8 MB in the beginning and 370.7 MB in the end (delta: 169.9 MB). Free memory was 118.2 MB in the beginning and 285.7 MB in the end (delta: -167.5 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:19:49,771 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 133.7 MB. Free memory was 116.7 MB in the beginning and 116.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 933.06 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 96.4 MB in the beginning and 166.6 MB in the end (delta: -70.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 93.84 ms. Allocated memory is still 200.8 MB. Free memory was 166.6 MB in the beginning and 163.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1007.48 ms. Allocated memory is still 200.8 MB. Free memory was 163.7 MB in the beginning and 118.9 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 160259.76 ms. Allocated memory was 200.8 MB in the beginning and 370.7 MB in the end (delta: 169.9 MB). Free memory was 118.2 MB in the beginning and 285.7 MB in the end (delta: -167.5 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L522] mlist *head; VAL [\old(head)=10, \old(head)=9, head={0:0}] [L543] int i; [L544] mlist *mylist, *temp; VAL [\old(head)=0, \old(head)=0, head={0:0}] [L545] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={-1:0}, k=2, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,2)=0, mylist={11:12}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=-1, \old(head)=0, \old(k)=5, head={-1:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, k=5, l={11:12}, l={31600:0}, malloc(sizeof(mlist))={31600:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, k=5, l={11:12}, l={31600:0}, malloc(sizeof(mlist))={31600:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-1, \old(head)=0, \old(k)=5, \result=0, head={31600:0}, k=5, l={11:12}, l={31600:0}, malloc(sizeof(mlist))={31600:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={31600:0}, insert_list(mylist,5)=0, mylist={11:12}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=31600, \old(k)=1, head={31600:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=31600, \old(k)=1, head={31600:0}, k=1, l={11:12}, l={31598:0}, malloc(sizeof(mlist))={31598:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=31600, \old(k)=1, head={31600:0}, k=1, l={31598:0}, l={11:12}, malloc(sizeof(mlist))={31598:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=31600, \old(k)=1, \result=0, head={31598:0}, k=1, l={31598:0}, l={11:12}, malloc(sizeof(mlist))={31598:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={31598:0}, insert_list(mylist,1)=0, mylist={11:12}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=0, \old(head)=31598, \old(k)=3, head={31598:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=31598, \old(k)=3, head={31598:0}, k=3, l={31599:0}, l={11:12}, malloc(sizeof(mlist))={31599:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=31598, \old(k)=3, head={31598:0}, k=3, l={11:12}, l={31599:0}, malloc(sizeof(mlist))={31599:0}] [L539] head = l [L540] return 0; VAL [\old(head)=31598, \old(head)=0, \old(k)=3, \result=0, head={31599:0}, k=3, l={11:12}, l={31599:0}, malloc(sizeof(mlist))={31599:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={31599:0}, insert_list(mylist,3)=0, mylist={11:12}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={31599:0}, l={31599:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={31599:0}, k=2, l={31599:0}, l={31599:0}] [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={31599:0}, k=2, l={31599:0}, l={31599:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={31599:0}, k=2, l={31599:0}, l={31598:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={31599:0}, k=2, l={31600:0}, l={31599:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={31599:0}, k=2, l={-1:0}, l={31599:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L525] COND FALSE !(l!=((void *)0) && l->key!=k) [L528] return l; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result={-1:0}, head={31599:0}, k=2, l={31599:0}, l={-1:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={31599:0}, mylist={11:12}, search_list(head,2)={-1:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={31599:0}, mylist={11:12}, temp={-1:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={31599:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={31599:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={31599:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 160.0s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 111.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 220 SDtfs, 295 SDslu, 640 SDs, 0 SdLazy, 1756 SolverSat, 178 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 17.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 514 GetRequests, 358 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 132.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, 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, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 44.3s InterpolantComputationTime, 398 NumberOfCodeBlocks, 398 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 381 ConstructedInterpolants, 12 QuantifiedInterpolants, 220621 SizeOfPredicates, 84 NumberOfNonLiveVariables, 2355 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 209/261 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...