/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 [2020-07-20 13:50:39,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:50:39,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:50:39,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:50:39,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:50:39,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:50:39,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:50:39,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:50:39,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:50:39,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:50:39,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:50:39,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:50:39,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:50:39,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:50:39,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:50:39,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:50:39,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:50:39,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:50:39,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:50:39,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:50:39,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:50:39,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:50:39,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:50:39,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:50:39,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:50:39,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:50:39,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:50:39,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:50:39,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:50:39,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:50:39,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:50:39,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:50:39,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:50:39,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:50:39,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:50:39,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:50:39,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:50:39,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:50:39,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:50:39,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:50:39,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:50:39,129 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 [2020-07-20 13:50:39,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:50:39,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:50:39,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:50:39,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:50:39,150 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:50:39,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:50:39,150 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:50:39,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:50:39,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:50:39,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:50:39,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:50:39,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:50:39,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:50:39,152 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:50:39,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:50:39,152 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:50:39,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:50:39,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:50:39,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:50:39,153 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:50:39,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:50:39,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:39,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:50:39,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:50:39,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:50:39,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:50:39,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:39,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:50:39,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:50:39,156 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:50:39,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:50:39,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:50:39,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:50:39,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:50:39,518 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:50:39,518 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-20 13:50:39,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c10fc6d/0c68276180384464bafca287f1b0d032/FLAG487dca546 [2020-07-20 13:50:40,401 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:50:40,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-20 13:50:40,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c10fc6d/0c68276180384464bafca287f1b0d032/FLAG487dca546 [2020-07-20 13:50:40,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c10fc6d/0c68276180384464bafca287f1b0d032 [2020-07-20 13:50:40,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:50:40,611 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:50:40,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:40,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:50:40,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:50:40,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71554420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:40, skipping insertion in model container [2020-07-20 13:50:40,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:40" (1/1) ... [2020-07-20 13:50:40,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:50:40,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:50:41,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:41,337 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:50:41,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:41,453 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:50:41,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41 WrapperNode [2020-07-20 13:50:41,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:41,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:50:41,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:50:41,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:50:41,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (1/1) ... [2020-07-20 13:50:41,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (1/1) ... [2020-07-20 13:50:41,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (1/1) ... [2020-07-20 13:50:41,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (1/1) ... [2020-07-20 13:50:41,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (1/1) ... [2020-07-20 13:50:41,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (1/1) ... [2020-07-20 13:50:41,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (1/1) ... [2020-07-20 13:50:41,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:50:41,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:50:41,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:50:41,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:50:41,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (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 [2020-07-20 13:50:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:50:41,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:50:41,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 13:50:41,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 13:50:41,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 13:50:41,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 13:50:41,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 13:50:41,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 13:50:41,641 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-20 13:50:41,641 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-20 13:50:41,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:50:41,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:50:41,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 13:50:41,642 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 13:50:41,642 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 13:50:41,643 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 13:50:41,643 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 13:50:41,643 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 13:50:41,644 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 13:50:41,644 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 13:50:41,644 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 13:50:41,644 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 13:50:41,644 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 13:50:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 13:50:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 13:50:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 13:50:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 13:50:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 13:50:41,645 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 13:50:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 13:50:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 13:50:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 13:50:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 13:50:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 13:50:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 13:50:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 13:50:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 13:50:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 13:50:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 13:50:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 13:50:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 13:50:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 13:50:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 13:50:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 13:50:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 13:50:41,648 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 13:50:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 13:50:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 13:50:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 13:50:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 13:50:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 13:50:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 13:50:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 13:50:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 13:50:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 13:50:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 13:50:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 13:50:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 13:50:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 13:50:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 13:50:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 13:50:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 13:50:41,651 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 13:50:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 13:50:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 13:50:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 13:50:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 13:50:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 13:50:41,652 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:50:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:50:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:50:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:50:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 13:50:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:50:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 13:50:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 13:50:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 13:50:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 13:50:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 13:50:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 13:50:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 13:50:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 13:50:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 13:50:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 13:50:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 13:50:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 13:50:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 13:50:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 13:50:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 13:50:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 13:50:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 13:50:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 13:50:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 13:50:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 13:50:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 13:50:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 13:50:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 13:50:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 13:50:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 13:50:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 13:50:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 13:50:41,659 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-20 13:50:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:50:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:50:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-20 13:50:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 13:50:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:50:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:50:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:50:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:50:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:50:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:50:42,382 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:50:42,382 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 13:50:42,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:42 BoogieIcfgContainer [2020-07-20 13:50:42,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:50:42,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:50:42,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:50:42,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:50:42,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:50:40" (1/3) ... [2020-07-20 13:50:42,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681ba3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:42, skipping insertion in model container [2020-07-20 13:50:42,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:41" (2/3) ... [2020-07-20 13:50:42,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681ba3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:42, skipping insertion in model container [2020-07-20 13:50:42,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:42" (3/3) ... [2020-07-20 13:50:42,402 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-20 13:50:42,417 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:50:42,429 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:50:42,444 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:50:42,472 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:50:42,472 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:50:42,473 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:50:42,473 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:50:42,473 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:50:42,473 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:50:42,473 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:50:42,473 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:50:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 13:50:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 13:50:42,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:42,506 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] [2020-07-20 13:50:42,507 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:42,514 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-20 13:50:42,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:42,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432276058] [2020-07-20 13:50:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:50:43,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:50:43,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:50:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 13:50:43,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:50:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 13:50:43,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432276058] [2020-07-20 13:50:43,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:50:43,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 13:50:43,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593310526] [2020-07-20 13:50:43,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:50:43,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:43,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:50:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:50:43,439 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-07-20 13:50:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:43,835 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-07-20 13:50:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:50:43,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-07-20 13:50:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:43,854 INFO L225 Difference]: With dead ends: 95 [2020-07-20 13:50:43,855 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 13:50:43,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:50:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 13:50:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-20 13:50:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 13:50:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-20 13:50:43,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-07-20 13:50:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:43,941 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-20 13:50:43,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:50:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-20 13:50:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 13:50:43,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:43,945 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] [2020-07-20 13:50:44,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:44,162 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-20 13:50:44,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:44,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033809226] [2020-07-20 13:50:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:50:45,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:45,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 13:50:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:45,699 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-20 13:50:45,701 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 [2020-07-20 13:50:45,702 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:45,709 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:45,710 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:45,711 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:7 [2020-07-20 13:50:45,775 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:50:45,780 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:50:45,844 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:50:45,906 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 [2020-07-20 13:50:45,908 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:45,909 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:45,910 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:45,911 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:1 [2020-07-20 13:50:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:50:45,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:45,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033809226] [2020-07-20 13:50:45,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:45,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 13:50:45,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100200170] [2020-07-20 13:50:45,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:50:45,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:45,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:50:45,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:50:45,924 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 10 states. [2020-07-20 13:50:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:46,320 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-07-20 13:50:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:50:46,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-07-20 13:50:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:46,326 INFO L225 Difference]: With dead ends: 56 [2020-07-20 13:50:46,326 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 13:50:46,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:50:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 13:50:46,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-07-20 13:50:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:50:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-20 13:50:46,341 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-20 13:50:46,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:46,341 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-20 13:50:46,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:50:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-20 13:50:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 13:50:46,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:46,344 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] [2020-07-20 13:50:46,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:46,558 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:46,559 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-20 13:50:46,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:46,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179111092] [2020-07-20 13:50:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:50:47,706 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:47,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:50:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:50:47,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:47,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179111092] [2020-07-20 13:50:47,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:47,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:50:47,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988806747] [2020-07-20 13:50:47,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:50:47,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:47,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:50:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:50:47,801 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-20 13:50:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:47,951 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-20 13:50:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:50:47,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-20 13:50:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:47,955 INFO L225 Difference]: With dead ends: 54 [2020-07-20 13:50:47,955 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:50:47,958 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 [2020-07-20 13:50:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:50:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 13:50:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:50:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-20 13:50:47,977 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-20 13:50:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:47,978 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-20 13:50:47,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:50:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-20 13:50:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 13:50:47,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:47,984 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] [2020-07-20 13:50:48,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:48,203 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-20 13:50:48,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:48,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746525824] [2020-07-20 13:50:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:50:49,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:49,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 78 conjunts are in the unsatisfiable core [2020-07-20 13:50:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:49,429 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 [2020-07-20 13:50:49,429 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:49,437 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:49,438 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:49,438 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-20 13:50:49,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:50:49,462 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 [2020-07-20 13:50:49,463 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:49,470 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:49,471 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:49,472 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:16 [2020-07-20 13:50:49,581 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 [2020-07-20 13:50:49,582 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:49,599 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:49,605 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 [2020-07-20 13:50:49,606 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:49,619 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:49,620 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. [2020-07-20 13:50:49,620 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:49 [2020-07-20 13:50:50,571 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 13:50:51,272 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 13:50:51,302 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:51,303 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 [2020-07-20 13:50:51,305 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:50:51,306 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:51,325 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:51,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:50:51,336 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 [2020-07-20 13:50:51,338 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:51,359 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:51,360 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. [2020-07-20 13:50:51,361 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:36 [2020-07-20 13:50:51,574 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 27 treesize of output 15 [2020-07-20 13:50:51,576 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:51,591 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:51,595 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 15 treesize of output 7 [2020-07-20 13:50:51,597 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:51,604 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:51,606 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:51,606 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:11 [2020-07-20 13:50:51,637 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 [2020-07-20 13:50:51,639 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:50:51,641 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:51,642 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:50:51,642 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-07-20 13:50:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:50:51,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:50:51,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:50:52,311 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:50:52,317 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:50:52,319 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 13:50:52,320 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:24 [2020-07-20 13:50:52,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746525824] [2020-07-20 13:50:52,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:50:52,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 13:50:52,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632137252] [2020-07-20 13:50:52,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:50:52,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:50:52,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:50:52,374 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 20 states. [2020-07-20 13:50:53,319 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:50:55,327 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 13:50:57,731 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 13:50:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:58,549 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-07-20 13:50:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 13:50:58,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-07-20 13:50:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:58,552 INFO L225 Difference]: With dead ends: 56 [2020-07-20 13:50:58,552 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 13:50:58,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 13:50:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 13:50:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-07-20 13:50:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 13:50:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-20 13:50:58,565 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-20 13:50:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:58,566 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-20 13:50:58,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:50:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-20 13:50:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 13:50:58,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:58,568 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] [2020-07-20 13:50:58,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:58,782 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:58,783 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-20 13:50:58,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:58,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051301558] [2020-07-20 13:50:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:51:00,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:51:00,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:51:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 94 conjunts are in the unsatisfiable core [2020-07-20 13:51:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:51:00,285 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 [2020-07-20 13:51:00,285 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:00,293 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:00,294 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:51:00,294 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-20 13:51:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:51:00,315 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 [2020-07-20 13:51:00,315 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:00,323 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:00,325 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:51:00,326 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-20 13:51:00,432 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 [2020-07-20 13:51:00,433 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:00,453 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:00,459 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 [2020-07-20 13:51:00,460 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:00,477 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:00,478 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. [2020-07-20 13:51:00,478 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:55 [2020-07-20 13:51:01,606 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 13:51:02,785 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 13:51:02,829 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:02,830 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 [2020-07-20 13:51:02,834 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:51:02,836 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:02,888 INFO L624 ElimStorePlain]: treesize reduction 32, result has 71.4 percent of original size [2020-07-20 13:51:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:51:02,905 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 [2020-07-20 13:51:02,906 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:02,924 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:02,925 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. [2020-07-20 13:51:02,926 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:76, output treesize:58 [2020-07-20 13:51:03,084 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:51:03,127 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:03,131 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:03,165 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:03,169 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:03,206 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:03,211 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:51:03,230 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:03,232 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. [2020-07-20 13:51:03,233 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-20 13:51:14,306 WARN L193 SmtUtils]: Spent 4.98 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:51:21,589 WARN L193 SmtUtils]: Spent 5.20 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:51:21,639 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:21,641 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 [2020-07-20 13:51:21,642 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 13:51:21,643 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:51:21,645 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:21,679 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:51:21,696 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 38 treesize of output 26 [2020-07-20 13:51:21,697 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:21,724 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:21,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:51:21,734 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 48 treesize of output 43 [2020-07-20 13:51:21,735 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:21,794 INFO L624 ElimStorePlain]: treesize reduction 4, result has 95.3 percent of original size [2020-07-20 13:51:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:51:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:51:21,805 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 39 treesize of output 38 [2020-07-20 13:51:21,806 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:21,833 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:21,834 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. [2020-07-20 13:51:21,835 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:107, output treesize:87 [2020-07-20 13:51:22,202 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:51:22,206 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:51:22,336 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:51:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:51:22,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:51:22,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:51:22,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:51:23,193 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:51:23,297 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:51:23,546 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 13:51:23,701 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:51:23,728 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.offset_71|, |v_#memory_$Pointer$.base_72|], 2=[|v_#memory_int_68|], 3=[|v_#memory_$Pointer$.base_71|, |v_#memory_$Pointer$.offset_72|]} [2020-07-20 13:51:23,734 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:23,793 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:23,799 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:51:23,838 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:23,845 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:51:23,873 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:23,876 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:51:23,890 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:23,893 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:51:23,904 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:51:23,906 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. [2020-07-20 13:51:23,907 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:124, output treesize:58 [2020-07-20 13:51:24,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051301558] [2020-07-20 13:51:24,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:51:24,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 13:51:24,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323123858] [2020-07-20 13:51:24,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:51:24,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:51:24,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:51:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=672, Unknown=4, NotChecked=0, Total=756 [2020-07-20 13:51:24,029 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 21 states. [2020-07-20 13:51:39,941 WARN L193 SmtUtils]: Spent 11.56 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-07-20 13:51:51,875 WARN L193 SmtUtils]: Spent 11.68 s on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-07-20 13:52:03,651 WARN L193 SmtUtils]: Spent 11.66 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-07-20 13:52:21,831 WARN L193 SmtUtils]: Spent 11.56 s on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-07-20 13:52:26,256 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-07-20 13:52:27,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:52:27,757 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-07-20 13:52:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 13:52:27,759 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-07-20 13:52:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:52:27,765 INFO L225 Difference]: With dead ends: 65 [2020-07-20 13:52:27,766 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 13:52:27,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 75.9s TimeCoverageRelationStatistics Valid=208, Invalid=1591, Unknown=7, NotChecked=0, Total=1806 [2020-07-20 13:52:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 13:52:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-07-20 13:52:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 13:52:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-07-20 13:52:27,801 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 53 [2020-07-20 13:52:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:52:27,802 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-07-20 13:52:27,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:52:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-07-20 13:52:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 13:52:27,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:52:27,808 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] [2020-07-20 13:52:28,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:52:28,010 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:52:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:52:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 1 times [2020-07-20 13:52:28,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:52:28,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726260299] [2020-07-20 13:52:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:52:28,961 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:52:28,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:52:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 62 conjunts are in the unsatisfiable core [2020-07-20 13:52:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:52:29,002 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 [2020-07-20 13:52:29,003 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:52:29,018 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:29,019 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:52:29,019 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 13:52:29,036 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 [2020-07-20 13:52:29,037 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:52:29,043 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:29,044 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:52:29,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-20 13:52:29,161 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_74|], 2=[|v_#memory_$Pointer$.base_75|, |v_#memory_$Pointer$.base_77|]} [2020-07-20 13:52:29,167 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 [2020-07-20 13:52:29,168 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:52:29,188 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:29,192 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:52:29,207 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:29,212 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:52:29,223 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:29,224 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:52:29,225 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:34 [2020-07-20 13:52:30,653 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 13:52:31,817 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 13:52:31,836 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:31,837 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 11 treesize of output 15 [2020-07-20 13:52:31,839 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:52:31,840 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:52:31,858 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:31,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:52:31,872 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 33 treesize of output 36 [2020-07-20 13:52:31,874 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:52:31,890 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:31,892 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:52:31,892 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:36 [2020-07-20 13:52:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:52:32,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:52:32,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:52:32,782 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_90|], 3=[|v_#memory_$Pointer$.base_89|]} [2020-07-20 13:52:32,785 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:52:32,796 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:32,799 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:52:32,809 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:52:32,810 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 13:52:32,811 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:27 [2020-07-20 13:52:32,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726260299] [2020-07-20 13:52:32,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:52:32,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 13:52:32,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457137703] [2020-07-20 13:52:32,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:52:32,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:52:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:52:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:52:32,874 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 18 states. [2020-07-20 13:52:35,600 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-07-20 13:52:43,006 WARN L193 SmtUtils]: Spent 7.31 s on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-07-20 13:52:46,223 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-07-20 13:52:49,323 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-07-20 13:52:56,701 WARN L193 SmtUtils]: Spent 7.34 s on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-07-20 13:52:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:52:57,718 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-07-20 13:52:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 13:52:57,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-20 13:52:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:52:57,721 INFO L225 Difference]: With dead ends: 65 [2020-07-20 13:52:57,724 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 13:52:57,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 13:52:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 13:52:57,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-07-20 13:52:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 13:52:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-07-20 13:52:57,758 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-07-20 13:52:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:52:57,759 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-07-20 13:52:57,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:52:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-07-20 13:52:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 13:52:57,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:52:57,763 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] [2020-07-20 13:52:57,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:52:57,980 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:52:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:52:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-20 13:52:57,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:52:57,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131030384] [2020-07-20 13:52:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:52:59,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:52:59,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:52:59,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:52:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:52:59,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:52:59,809 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:52:59,809 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:53:00,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:53:00,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:53:00 BoogieIcfgContainer [2020-07-20 13:53:00,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:53:00,110 INFO L168 Benchmark]: Toolchain (without parser) took 139500.77 ms. Allocated memory was 137.9 MB in the beginning and 302.0 MB in the end (delta: 164.1 MB). Free memory was 101.3 MB in the beginning and 136.9 MB in the end (delta: -35.6 MB). Peak memory consumption was 128.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:00,111 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 13:53:00,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 841.88 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 167.8 MB in the end (delta: -67.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:00,113 INFO L168 Benchmark]: Boogie Preprocessor took 84.00 ms. Allocated memory is still 201.9 MB. Free memory was 167.8 MB in the beginning and 165.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:00,113 INFO L168 Benchmark]: RCFGBuilder took 849.39 ms. Allocated memory is still 201.9 MB. Free memory was 165.2 MB in the beginning and 120.5 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:00,114 INFO L168 Benchmark]: TraceAbstraction took 137716.74 ms. Allocated memory was 201.9 MB in the beginning and 302.0 MB in the end (delta: 100.1 MB). Free memory was 119.9 MB in the beginning and 136.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 83.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:53:00,128 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 841.88 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 167.8 MB in the end (delta: -67.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.00 ms. Allocated memory is still 201.9 MB. Free memory was 167.8 MB in the beginning and 165.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 849.39 ms. Allocated memory is still 201.9 MB. Free memory was 165.2 MB in the beginning and 120.5 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 137716.74 ms. Allocated memory was 201.9 MB in the beginning and 302.0 MB in the end (delta: 100.1 MB). Free memory was 119.9 MB in the beginning and 136.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 83.1 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)=6, 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={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [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={11:12}, l={-3:0}, malloc(sizeof(mlist))={-3:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={-3:0}, k=2, l={11:12}, l={-3:0}, malloc(sizeof(mlist))={-3:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={-3:0}, insert_list(mylist,2)=0, mylist={11:12}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=0, \old(head)=-3, \old(k)=5, head={-3:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=-3, \old(k)=5, head={-3:0}, k=5, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-3, \old(k)=5, head={-3:0}, k=5, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-3, \old(head)=0, \old(k)=5, \result=0, head={-1:0}, k=5, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,5)=0, mylist={11:12}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=-1, \old(k)=1, 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)=1, head={-1:0}, k=1, l={11:12}, l={7036:0}, malloc(sizeof(mlist))={7036:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=-1, \old(head)=0, \old(k)=1, head={-1:0}, k=1, l={11:12}, l={7036:0}, malloc(sizeof(mlist))={7036:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-1, \old(head)=0, \old(k)=1, \result=0, head={7036:0}, k=1, l={7036:0}, l={11:12}, malloc(sizeof(mlist))={7036:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={7036:0}, insert_list(mylist,1)=0, mylist={11:12}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=0, \old(head)=7036, \old(k)=3, head={7036:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=7036, \old(head)=0, \old(k)=3, head={7036:0}, k=3, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=7036, \old(k)=3, head={7036:0}, k=3, l={11:12}, l={-2:0}, malloc(sizeof(mlist))={-2:0}] [L539] head = l [L540] return 0; VAL [\old(head)=7036, \old(head)=0, \old(k)=3, \result=0, head={-2:0}, k=3, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={-2:0}, 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={-2:0}, l={-2:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-2:0}, k=2, l={-2:0}, l={-2:0}] [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={-2:0}, k=2, l={-2:0}, l={-2:0}, 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={-2:0}, k=2, l={-2:0}, l={7036:0}, 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={-2:0}, k=2, l={-2:0}, l={-1:0}, 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={-2:0}, k=2, l={-3:0}, l={-2:0}, 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={-3:0}, head={-2:0}, k=2, l={-3:0}, l={-2:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={-2:0}, mylist={11:12}, search_list(head,2)={-3:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={-2:0}, mylist={11:12}, temp={-3:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={-2:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-2:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 137.5s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 95.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 166 SDtfs, 368 SDslu, 649 SDs, 0 SdLazy, 1806 SolverSat, 208 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 11.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 463 GetRequests, 307 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 111.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=5, 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, 6 MinimizatonAttempts, 36 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 7.5s SatisfiabilityAnalysisTime, 31.3s InterpolantComputationTime, 351 NumberOfCodeBlocks, 330 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 333 ConstructedInterpolants, 12 QuantifiedInterpolants, 227959 SizeOfPredicates, 84 NumberOfNonLiveVariables, 1950 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 154/231 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...