/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:58:18,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:58:18,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:58:18,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:58:18,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:58:18,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:58:18,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:58:18,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:58:18,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:58:18,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:58:18,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:58:18,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:58:18,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:58:18,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:58:18,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:58:18,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:58:18,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:58:18,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:58:18,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:58:18,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:58:18,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:58:18,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:58:18,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:58:18,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:58:18,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 19:58:18,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 19:58:18,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 19:58:18,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 19:58:18,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 19:58:18,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 19:58:18,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 19:58:18,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 19:58:18,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 19:58:18,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 19:58:18,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 19:58:18,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 19:58:18,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 19:58:18,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 19:58:18,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:58:18,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:58:18,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:58:18,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:58:18,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:58:18,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:58:18,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:58:18,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:58:18,306 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:58:18,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:58:18,306 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:58:18,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:58:18,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:58:18,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:58:18,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:58:18,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:58:18,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:58:18,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:58:18,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:58:18,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:58:18,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:58:18,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:58:18,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:58:18,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:58:18,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:58:18,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:58:18,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:58:18,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:58:18,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:58:18,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:58:18,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:18,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:58:18,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:58:18,310 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 -> DAGSIZE 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 -> 2 [2020-07-21 19:58:18,586 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:58:18,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:58:18,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:58:18,605 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:58:18,605 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:58:18,606 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 19:58:18,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7da4ad667/533838ec199245dab471170cfbf70973/FLAG910639972 [2020-07-21 19:58:19,233 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:58:19,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 19:58:19,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7da4ad667/533838ec199245dab471170cfbf70973/FLAG910639972 [2020-07-21 19:58:19,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7da4ad667/533838ec199245dab471170cfbf70973 [2020-07-21 19:58:19,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:58:19,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:58:19,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:58:19,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:58:19,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:58:19,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:58:19" (1/1) ... [2020-07-21 19:58:19,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c612bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:19, skipping insertion in model container [2020-07-21 19:58:19,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:58:19" (1/1) ... [2020-07-21 19:58:19,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:58:19,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:58:20,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:58:20,088 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:58:20,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:58:20,191 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:58:20,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20 WrapperNode [2020-07-21 19:58:20,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:58:20,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:58:20,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:58:20,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:58:20,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (1/1) ... [2020-07-21 19:58:20,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (1/1) ... [2020-07-21 19:58:20,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (1/1) ... [2020-07-21 19:58:20,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (1/1) ... [2020-07-21 19:58:20,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (1/1) ... [2020-07-21 19:58:20,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (1/1) ... [2020-07-21 19:58:20,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (1/1) ... [2020-07-21 19:58:20,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:58:20,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:58:20,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:58:20,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:58:20,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:58:20,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:58:20,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:58:20,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 19:58:20,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 19:58:20,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 19:58:20,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 19:58:20,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 19:58:20,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 19:58:20,337 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-21 19:58:20,338 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-21 19:58:20,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:58:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:58:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 19:58:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 19:58:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 19:58:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 19:58:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 19:58:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 19:58:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 19:58:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 19:58:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 19:58:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 19:58:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 19:58:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 19:58:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 19:58:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 19:58:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 19:58:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 19:58:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 19:58:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 19:58:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 19:58:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 19:58:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 19:58:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 19:58:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 19:58:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 19:58:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 19:58:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 19:58:20,343 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 19:58:20,343 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 19:58:20,343 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 19:58:20,343 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 19:58:20,343 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 19:58:20,343 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 19:58:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 19:58:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 19:58:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 19:58:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 19:58:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 19:58:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 19:58:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 19:58:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 19:58:20,349 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 19:58:20,349 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 19:58:20,350 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 19:58:20,350 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 19:58:20,350 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 19:58:20,350 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 19:58:20,350 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 19:58:20,350 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 19:58:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 19:58:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 19:58:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 19:58:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 19:58:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 19:58:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 19:58:20,351 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 19:58:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 19:58:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 19:58:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 19:58:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 19:58:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 19:58:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 19:58:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 19:58:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 19:58:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 19:58:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 19:58:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 19:58:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 19:58:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 19:58:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 19:58:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 19:58:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 19:58:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 19:58:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 19:58:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 19:58:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 19:58:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 19:58:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 19:58:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 19:58:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 19:58:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 19:58:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 19:58:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 19:58:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 19:58:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 19:58:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 19:58:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 19:58:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 19:58:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 19:58:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 19:58:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 19:58:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 19:58:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 19:58:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 19:58:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 19:58:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 19:58:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 19:58:20,360 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 19:58:20,360 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 19:58:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 19:58:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 19:58:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-21 19:58:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 19:58:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 19:58:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-21 19:58:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 19:58:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 19:58:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 19:58:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:58:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 19:58:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:58:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:58:20,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:58:20,912 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 19:58:20,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:58:20 BoogieIcfgContainer [2020-07-21 19:58:20,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:58:20,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:58:20,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:58:20,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:58:20,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:58:19" (1/3) ... [2020-07-21 19:58:20,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f243070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:58:20, skipping insertion in model container [2020-07-21 19:58:20,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:58:20" (2/3) ... [2020-07-21 19:58:20,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f243070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:58:20, skipping insertion in model container [2020-07-21 19:58:20,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:58:20" (3/3) ... [2020-07-21 19:58:20,929 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-21 19:58:20,940 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:58:20,947 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:58:20,960 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:58:20,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:58:20,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:58:20,982 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:58:20,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:58:20,982 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:58:20,982 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:58:20,983 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:58:20,983 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:58:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-21 19:58:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 19:58:21,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:21,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:58:21,007 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-21 19:58:21,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:21,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184077172] [2020-07-21 19:58:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:58:21,345 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:58:21,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:58:21,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 19:58:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:58:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:58:21,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:58:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:58:21,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184077172] [2020-07-21 19:58:21,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:58:21,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-21 19:58:21,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745166064] [2020-07-21 19:58:21,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 19:58:21,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:58:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 19:58:21,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:58:21,567 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-07-21 19:58:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:58:21,846 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-07-21 19:58:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:58:21,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-07-21 19:58:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:58:21,860 INFO L225 Difference]: With dead ends: 95 [2020-07-21 19:58:21,860 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 19:58:21,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:58:21,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 19:58:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-21 19:58:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 19:58:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-21 19:58:21,923 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-07-21 19:58:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:58:21,924 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-21 19:58:21,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 19:58:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-21 19:58:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 19:58:21,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:21,932 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:58:22,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:22,148 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-21 19:58:22,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:22,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944736906] [2020-07-21 19:58:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:58:22,558 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:58:22,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:58:22,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:58:22,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:58:22,642 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 19:58:22,643 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 19:58:22,643 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:22,649 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:22,650 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:22,651 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:7 [2020-07-21 19:58:22,705 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:22,708 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:22,759 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 19:58:22,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:58:22,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944736906] [2020-07-21 19:58:22,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:58:22,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 19:58:22,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850069393] [2020-07-21 19:58:22,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 19:58:22,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:58:22,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 19:58:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:58:22,793 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-07-21 19:58:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:58:23,022 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-07-21 19:58:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:58:23,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-07-21 19:58:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:58:23,026 INFO L225 Difference]: With dead ends: 56 [2020-07-21 19:58:23,027 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 19:58:23,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:58:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 19:58:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-07-21 19:58:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 19:58:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 19:58:23,037 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-21 19:58:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:58:23,038 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 19:58:23,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 19:58:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 19:58:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 19:58:23,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:23,040 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:58:23,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:23,256 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-21 19:58:23,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:23,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040140645] [2020-07-21 19:58:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:58:23,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:58:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:58:23,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 19:58:23,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:58:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 19:58:23,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:58:23,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040140645] [2020-07-21 19:58:23,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:58:23,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 19:58:23,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999607849] [2020-07-21 19:58:23,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 19:58:23,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:58:23,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 19:58:23,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:58:23,626 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-21 19:58:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:58:23,717 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 19:58:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:58:23,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-21 19:58:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:58:23,719 INFO L225 Difference]: With dead ends: 54 [2020-07-21 19:58:23,719 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 19:58:23,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:58:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 19:58:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 19:58:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 19:58:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-21 19:58:23,728 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-21 19:58:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:58:23,728 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-21 19:58:23,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 19:58:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-21 19:58:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 19:58:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:23,730 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:58:23,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:23,944 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-21 19:58:23,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:23,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570785269] [2020-07-21 19:58:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:58:24,498 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:58:24,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:58:24,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-21 19:58:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:58:24,523 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 19:58:24,524 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:24,530 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:24,531 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:24,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 19:58:24,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 19:58:24,550 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 19:58:24,551 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:24,560 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:24,561 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:24,561 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-21 19:58:24,653 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 19:58:24,654 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:24,666 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:24,672 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 19:58:24,672 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:24,682 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:24,683 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:24,683 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:46 [2020-07-21 19:58:25,385 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 19:58:26,040 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 19:58:26,070 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:26,071 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2020-07-21 19:58:26,072 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:26,073 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,088 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:26,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 19:58:26,103 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2020-07-21 19:58:26,104 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,112 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:26,113 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:26,114 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:33 [2020-07-21 19:58:26,234 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:26,240 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:26,302 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:58:26,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:58:26,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:58:26,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:58:26,795 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:26,803 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:26,804 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:26,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:26 [2020-07-21 19:58:26,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570785269] [2020-07-21 19:58:26,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 19:58:26,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-21 19:58:26,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325990782] [2020-07-21 19:58:26,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:58:26,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:58:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:58:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:58:26,856 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 15 states. [2020-07-21 19:58:27,799 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:58:29,580 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 19:58:31,519 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 19:58:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:58:32,019 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-07-21 19:58:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 19:58:32,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-07-21 19:58:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:58:32,023 INFO L225 Difference]: With dead ends: 60 [2020-07-21 19:58:32,023 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 19:58:32,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:58:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 19:58:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-07-21 19:58:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 19:58:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-21 19:58:32,033 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-21 19:58:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:58:32,034 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-21 19:58:32,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:58:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-21 19:58:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 19:58:32,035 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:32,036 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2020-07-21 19:58:32,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:32,246 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:32,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:32,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1841731081, now seen corresponding path program 1 times [2020-07-21 19:58:32,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:32,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444609319] [2020-07-21 19:58:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:58:32,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:58:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:58:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:58:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:58:32,778 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 19:58:32,778 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:32,780 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:32,780 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:32,781 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 19:58:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:58:32,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:58:32,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:58:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:58:33,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444609319] [2020-07-21 19:58:33,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:58:33,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-07-21 19:58:33,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718685152] [2020-07-21 19:58:33,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:58:33,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:58:33,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:58:33,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:58:33,142 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 18 states. [2020-07-21 19:58:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:58:33,766 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-21 19:58:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 19:58:33,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-21 19:58:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:58:33,768 INFO L225 Difference]: With dead ends: 60 [2020-07-21 19:58:33,768 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 19:58:33,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 19:58:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 19:58:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-21 19:58:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 19:58:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-21 19:58:33,785 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 50 [2020-07-21 19:58:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:58:33,785 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-21 19:58:33,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:58:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-21 19:58:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 19:58:33,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:58:33,787 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:58:34,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:58:34,003 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:58:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:58:34,004 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-21 19:58:34,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:58:34,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941109132] [2020-07-21 19:58:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:58:34,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:58:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:58:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-21 19:58:34,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:58:34,379 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 19:58:34,380 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:34,385 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:34,386 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:34,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 19:58:34,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 19:58:34,403 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 19:58:34,403 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:34,411 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:34,411 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:34,412 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-21 19:58:34,512 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 19:58:34,512 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:34,526 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:34,531 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 19:58:34,532 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:34,544 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:34,544 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:34,545 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:52 [2020-07-21 19:58:35,264 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:58:36,295 WARN L193 SmtUtils]: Spent 995.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:58:36,330 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:36,331 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 69 [2020-07-21 19:58:36,332 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:36,369 INFO L624 ElimStorePlain]: treesize reduction 32, result has 68.9 percent of original size [2020-07-21 19:58:36,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 19:58:36,380 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2020-07-21 19:58:36,380 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:36,397 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:36,398 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:36,399 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:49 [2020-07-21 19:58:36,532 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:36,568 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:36,572 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:36,600 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:36,604 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:36,633 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:36,636 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:36,651 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:36,652 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:36,653 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-21 19:58:42,718 WARN L193 SmtUtils]: Spent 4.46 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:58:46,349 WARN L193 SmtUtils]: Spent 3.58 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:58:46,387 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:46,388 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 22 treesize of output 32 [2020-07-21 19:58:46,389 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:46,416 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:46,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 19:58:46,426 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 36 treesize of output 24 [2020-07-21 19:58:46,427 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:46,455 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:46,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 19:58:46,468 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 26 treesize of output 29 [2020-07-21 19:58:46,468 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:46,494 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 19:58:46,506 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 50 treesize of output 41 [2020-07-21 19:58:46,507 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:46,529 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:46,531 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:58:46,532 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:111, output treesize:110 [2020-07-21 19:58:46,844 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:46,845 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:46,942 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:58:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:58:47,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:58:47,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:58:47,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:58:47,689 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:58:47,902 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 19:58:48,027 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.offset_92|, |v_#memory_$Pointer$.base_98|], 2=[|v_#memory_int_90|], 3=[|v_#memory_$Pointer$.offset_91|, |v_#memory_$Pointer$.base_97|]} [2020-07-21 19:58:48,031 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:48,057 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:48,061 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:58:48,082 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:48,086 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:48,100 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:48,104 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:48,116 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:48,119 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:48,127 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:58:48,129 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-21 19:58:48,129 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:125, output treesize:59 [2020-07-21 19:58:48,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941109132] [2020-07-21 19:58:48,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 19:58:48,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-21 19:58:48,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871149131] [2020-07-21 19:58:48,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:58:48,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:58:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:58:48,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=785, Unknown=1, NotChecked=0, Total=870 [2020-07-21 19:58:48,234 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 21 states. [2020-07-21 19:59:00,687 WARN L193 SmtUtils]: Spent 8.75 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-07-21 19:59:10,530 WARN L193 SmtUtils]: Spent 9.65 s on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-07-21 19:59:18,660 WARN L193 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-07-21 19:59:33,829 WARN L193 SmtUtils]: Spent 9.03 s on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-07-21 19:59:37,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:59:37,188 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-07-21 19:59:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 19:59:37,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-07-21 19:59:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:59:37,191 INFO L225 Difference]: With dead ends: 65 [2020-07-21 19:59:37,191 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 19:59:37,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=212, Invalid=1764, Unknown=4, NotChecked=0, Total=1980 [2020-07-21 19:59:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 19:59:37,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-07-21 19:59:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 19:59:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-07-21 19:59:37,201 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-07-21 19:59:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:59:37,202 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-07-21 19:59:37,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:59:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-07-21 19:59:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 19:59:37,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:59:37,203 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:59:37,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:59:37,419 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:59:37,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:59:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 2 times [2020-07-21 19:59:37,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:59:37,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156076525] [2020-07-21 19:59:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 19:59:37,685 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:59:37,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:59:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-21 19:59:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:59:37,719 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 19:59:37,719 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:59:37,727 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:37,728 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 19:59:37,728 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 19:59:37,740 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:59:37,752 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 19:59:37,752 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:59:37,761 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 19:59:37,761 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:59:37,803 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:37,804 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 19:59:37,805 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2020-07-21 19:59:37,920 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_94|], 2=[|v_#memory_$Pointer$.base_101|, |v_#memory_$Pointer$.base_103|]} [2020-07-21 19:59:37,926 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 19:59:37,927 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:59:37,947 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:37,949 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:59:37,963 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:37,965 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 19:59:37,976 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:37,977 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:59:37,977 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:34 [2020-07-21 19:59:38,806 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 19:59:39,930 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 19:59:39,960 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:39,961 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 [2020-07-21 19:59:39,962 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:59:39,974 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:39,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 19:59:39,988 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 25 treesize of output 28 [2020-07-21 19:59:39,989 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 19:59:40,001 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:40,002 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. [2020-07-21 19:59:40,003 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:37 [2020-07-21 19:59:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:59:40,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:59:40,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:59:40,628 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_116|], 3=[|v_#memory_$Pointer$.base_115|]} [2020-07-21 19:59:40,630 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 19:59:40,639 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:40,642 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 19:59:40,647 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 19:59:40,648 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. [2020-07-21 19:59:40,648 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:28 [2020-07-21 19:59:40,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156076525] [2020-07-21 19:59:40,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 19:59:40,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 19:59:40,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527936553] [2020-07-21 19:59:40,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:59:40,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:59:40,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:59:40,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:59:40,714 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 18 states. [2020-07-21 19:59:41,602 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 19:59:43,990 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-07-21 19:59:46,545 WARN L193 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:59:50,637 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-07-21 19:59:51,787 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 19:59:52,609 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:59:55,321 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-07-21 19:59:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:59:58,079 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-07-21 19:59:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 19:59:58,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-21 19:59:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:59:58,081 INFO L225 Difference]: With dead ends: 71 [2020-07-21 19:59:58,081 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 19:59:58,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 19:59:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 19:59:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-07-21 19:59:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 19:59:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-21 19:59:58,091 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2020-07-21 19:59:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:59:58,091 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-21 19:59:58,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:59:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-21 19:59:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 19:59:58,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:59:58,093 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:59:58,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:59:58,309 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:59:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:59:58,310 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-21 19:59:58,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:59:58,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045747209] [2020-07-21 19:59:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:59:59,067 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:59:59,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 19:59:59,067 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:59:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 19:59:59,155 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:59:59,210 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 19:59:59,210 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 19:59:59,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:59:59,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:59:59 BoogieIcfgContainer [2020-07-21 19:59:59,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:59:59,493 INFO L168 Benchmark]: Toolchain (without parser) took 99930.10 ms. Allocated memory was 145.8 MB in the beginning and 335.5 MB in the end (delta: 189.8 MB). Free memory was 100.6 MB in the beginning and 205.6 MB in the end (delta: -105.1 MB). Peak memory consumption was 84.7 MB. Max. memory is 7.1 GB. [2020-07-21 19:59:59,493 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 19:59:59,494 INFO L168 Benchmark]: CACSL2BoogieTranslator took 627.65 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 100.3 MB in the beginning and 170.5 MB in the end (delta: -70.2 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:59:59,494 INFO L168 Benchmark]: Boogie Preprocessor took 74.48 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 167.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-21 19:59:59,495 INFO L168 Benchmark]: RCFGBuilder took 652.95 ms. Allocated memory is still 203.9 MB. Free memory was 167.9 MB in the beginning and 122.3 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:59:59,495 INFO L168 Benchmark]: TraceAbstraction took 98569.35 ms. Allocated memory was 203.9 MB in the beginning and 335.5 MB in the end (delta: 131.6 MB). Free memory was 122.3 MB in the beginning and 205.6 MB in the end (delta: -83.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:59:59,498 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 627.65 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 100.3 MB in the beginning and 170.5 MB in the end (delta: -70.2 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.48 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 167.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 652.95 ms. Allocated memory is still 203.9 MB. Free memory was 167.9 MB in the beginning and 122.3 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 98569.35 ms. Allocated memory was 203.9 MB in the beginning and 335.5 MB in the end (delta: 131.6 MB). Free memory was 122.3 MB in the beginning and 205.6 MB in the end (delta: -83.3 MB). Peak memory consumption was 48.3 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={12:11}] [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={42468:0}, l={12:11}, malloc(sizeof(mlist))={42468:0}] [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={42468:0}, l={12:11}, malloc(sizeof(mlist))={42468:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={42468:0}, k=2, l={42468:0}, l={12:11}, malloc(sizeof(mlist))={42468:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={42468:0}, insert_list(mylist,2)=0, mylist={12:11}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=0, \old(head)=42468, \old(k)=5, head={42468:0}, l={12:11}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=42468, \old(k)=5, head={42468:0}, k=5, l={-1:0}, l={12:11}, malloc(sizeof(mlist))={-1:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=42468, \old(head)=0, \old(k)=5, head={42468:0}, k=5, l={12:11}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=42468, \old(k)=5, \result=0, head={-1:0}, k=5, l={12:11}, l={-1:0}, 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={12:11}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=-1, \old(k)=1, head={-1:0}, l={12:11}] [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={12:11}, l={42469:0}, malloc(sizeof(mlist))={42469:0}] [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={42469:0}, l={12:11}, malloc(sizeof(mlist))={42469:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-1, \old(k)=1, \result=0, head={42469:0}, k=1, l={12:11}, l={42469:0}, malloc(sizeof(mlist))={42469:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={42469:0}, insert_list(mylist,1)=0, mylist={12:11}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=42469, \old(head)=0, \old(k)=3, head={42469:0}, l={12:11}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=42469, \old(head)=0, \old(k)=3, head={42469:0}, k=3, l={17573:0}, l={12:11}, malloc(sizeof(mlist))={17573:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=42469, \old(head)=0, \old(k)=3, head={42469:0}, k=3, l={12:11}, l={17573:0}, malloc(sizeof(mlist))={17573:0}] [L539] head = l [L540] return 0; VAL [\old(head)=42469, \old(head)=0, \old(k)=3, \result=0, head={17573:0}, k=3, l={17573:0}, l={12:11}, malloc(sizeof(mlist))={17573:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={17573:0}, insert_list(mylist,3)=0, mylist={12:11}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={17573:0}, l={17573:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={17573:0}, k=2, l={17573:0}, l={17573:0}] [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={17573:0}, k=2, l={17573:0}, l={17573:0}, 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={17573:0}, k=2, l={42469:0}, l={17573:0}, 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={17573:0}, k=2, l={17573:0}, 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={17573:0}, k=2, l={42468:0}, l={17573:0}, 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={42468:0}, head={17573:0}, k=2, l={17573:0}, l={42468:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={17573:0}, mylist={12:11}, search_list(head,2)={42468:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={17573:0}, mylist={12:11}, temp={42468:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={17573:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={17573:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={17573:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 98.4s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 72.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 414 SDslu, 642 SDs, 0 SdLazy, 1810 SolverSat, 277 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 10.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 577 GetRequests, 397 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 79.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 50 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 401 NumberOfCodeBlocks, 379 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 431 ConstructedInterpolants, 12 QuantifiedInterpolants, 265034 SizeOfPredicates, 89 NumberOfNonLiveVariables, 2285 ConjunctsInSsa, 268 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 238/297 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...