/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:51:07,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:51:07,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:51:07,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:51:07,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:51:07,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:51:07,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:51:07,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:51:07,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:51:07,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:51:07,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:51:07,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:51:07,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:51:07,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:51:07,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:51:07,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:51:07,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:51:07,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:51:07,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:51:07,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:51:07,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:51:07,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:51:07,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:51:07,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:51:07,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:51:07,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:51:07,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:51:07,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:51:07,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:51:07,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:51:07,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:51:07,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:51:07,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:51:07,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:51:07,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:51:07,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:51:07,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:51:07,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:51:07,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:51:07,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:51:07,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:51:07,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:51:07,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:51:07,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:51:07,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:51:07,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:51:07,264 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:51:07,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:51:07,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:51:07,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:51:07,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:51:07,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:51:07,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:51:07,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:51:07,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:51:07,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:51:07,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:51:07,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:51:07,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:51:07,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:51:07,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:51:07,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:51:07,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:51:07,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:51:07,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:51:07,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:51:07,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:51:07,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:51:07,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:07,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:51:07,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:51:07,269 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 -> 4 [2020-07-20 21:51:07,560 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:51:07,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:51:07,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:51:07,581 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:51:07,581 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:51:07,582 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-20 21:51:07,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d676417/0abb8cadfd6c4f4e8cae37981f59b3a2/FLAG0974783e8 [2020-07-20 21:51:08,277 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:51:08,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-20 21:51:08,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d676417/0abb8cadfd6c4f4e8cae37981f59b3a2/FLAG0974783e8 [2020-07-20 21:51:08,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d676417/0abb8cadfd6c4f4e8cae37981f59b3a2 [2020-07-20 21:51:08,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:51:08,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:51:08,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:51:08,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:51:08,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:51:08,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:51:08" (1/1) ... [2020-07-20 21:51:08,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d63a9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:08, skipping insertion in model container [2020-07-20 21:51:08,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:51:08" (1/1) ... [2020-07-20 21:51:08,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:51:08,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:51:09,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:51:09,059 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:51:09,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:51:09,174 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:51:09,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09 WrapperNode [2020-07-20 21:51:09,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:51:09,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:51:09,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:51:09,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:51:09,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (1/1) ... [2020-07-20 21:51:09,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (1/1) ... [2020-07-20 21:51:09,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (1/1) ... [2020-07-20 21:51:09,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (1/1) ... [2020-07-20 21:51:09,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (1/1) ... [2020-07-20 21:51:09,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (1/1) ... [2020-07-20 21:51:09,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (1/1) ... [2020-07-20 21:51:09,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:51:09,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:51:09,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:51:09,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:51:09,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:51:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:51:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:51:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 21:51:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 21:51:09,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 21:51:09,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 21:51:09,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 21:51:09,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 21:51:09,324 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-20 21:51:09,324 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-20 21:51:09,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:51:09,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:51:09,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 21:51:09,325 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 21:51:09,325 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 21:51:09,325 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 21:51:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 21:51:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 21:51:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 21:51:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 21:51:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 21:51:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 21:51:09,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 21:51:09,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 21:51:09,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 21:51:09,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 21:51:09,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 21:51:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 21:51:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 21:51:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 21:51:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 21:51:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 21:51:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 21:51:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 21:51:09,329 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 21:51:09,329 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 21:51:09,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 21:51:09,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 21:51:09,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 21:51:09,330 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 21:51:09,330 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 21:51:09,330 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 21:51:09,330 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 21:51:09,330 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 21:51:09,330 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 21:51:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 21:51:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 21:51:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 21:51:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 21:51:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 21:51:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 21:51:09,331 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 21:51:09,332 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 21:51:09,332 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 21:51:09,332 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 21:51:09,332 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 21:51:09,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 21:51:09,332 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 21:51:09,333 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 21:51:09,333 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 21:51:09,333 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 21:51:09,333 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 21:51:09,333 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 21:51:09,333 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 21:51:09,334 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 21:51:09,334 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 21:51:09,334 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 21:51:09,334 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 21:51:09,334 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 21:51:09,335 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 21:51:09,335 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 21:51:09,335 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 21:51:09,335 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 21:51:09,335 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 21:51:09,335 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 21:51:09,335 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 21:51:09,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 21:51:09,336 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 21:51:09,336 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 21:51:09,336 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 21:51:09,336 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 21:51:09,336 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 21:51:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 21:51:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 21:51:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 21:51:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 21:51:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 21:51:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 21:51:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 21:51:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 21:51:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 21:51:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 21:51:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 21:51:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 21:51:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 21:51:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 21:51:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 21:51:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 21:51:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 21:51:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 21:51:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 21:51:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 21:51:09,340 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 21:51:09,340 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 21:51:09,340 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 21:51:09,340 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 21:51:09,340 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 21:51:09,340 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 21:51:09,341 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 21:51:09,341 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 21:51:09,341 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 21:51:09,341 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 21:51:09,341 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 21:51:09,341 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 21:51:09,342 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 21:51:09,342 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 21:51:09,342 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 21:51:09,342 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 21:51:09,342 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 21:51:09,342 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 21:51:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-20 21:51:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:51:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:51:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-20 21:51:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 21:51:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:51:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:51:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:51:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:51:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:51:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:51:09,887 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:51:09,888 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 21:51:09,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:51:09 BoogieIcfgContainer [2020-07-20 21:51:09,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:51:09,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:51:09,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:51:09,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:51:09,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:51:08" (1/3) ... [2020-07-20 21:51:09,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6c027d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:51:09, skipping insertion in model container [2020-07-20 21:51:09,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:51:09" (2/3) ... [2020-07-20 21:51:09,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6c027d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:51:09, skipping insertion in model container [2020-07-20 21:51:09,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:51:09" (3/3) ... [2020-07-20 21:51:09,903 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-20 21:51:09,915 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:51:09,925 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:51:09,943 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:51:09,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:51:09,973 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:51:09,973 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:51:09,973 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:51:09,974 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:51:09,974 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:51:09,975 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:51:09,975 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:51:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 21:51:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 21:51:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:51:10,007 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:51:10,007 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:51:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:51:10,014 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-20 21:51:10,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:51:10,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081471371] [2020-07-20 21:51:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:10,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:51:10,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:51:10,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 21:51:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:51:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 21:51:10,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:51:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 21:51:10,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081471371] [2020-07-20 21:51:10,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:51:10,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 21:51:10,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139992898] [2020-07-20 21:51:10,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:51:10,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:51:10,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:51:10,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:51:10,668 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-07-20 21:51:10,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:51:10,953 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-07-20 21:51:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:51:10,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-07-20 21:51:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:51:10,969 INFO L225 Difference]: With dead ends: 95 [2020-07-20 21:51:10,970 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 21:51:10,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:51:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 21:51:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-20 21:51:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 21:51:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-20 21:51:11,037 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-07-20 21:51:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:51:11,038 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-20 21:51:11,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:51:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-20 21:51:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 21:51:11,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:51:11,044 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:51:11,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:11,261 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:51:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:51:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-20 21:51:11,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:51:11,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609096363] [2020-07-20 21:51:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:11,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:51:11,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:51:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 21:51:11,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:51:12,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:12,051 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-20 21:51:12,052 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:12,063 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:12,065 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:51:12,066 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:11 [2020-07-20 21:51:12,166 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:12,177 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:12,247 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:51:12,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:51:12,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609096363] [2020-07-20 21:51:12,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:51:12,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 21:51:12,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379643434] [2020-07-20 21:51:12,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:51:12,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:51:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:51:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:51:12,287 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-07-20 21:51:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:51:12,545 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-07-20 21:51:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:51:12,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-07-20 21:51:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:51:12,551 INFO L225 Difference]: With dead ends: 57 [2020-07-20 21:51:12,551 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 21:51:12,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:51:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 21:51:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-20 21:51:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 21:51:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-20 21:51:12,564 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-20 21:51:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:51:12,564 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-20 21:51:12,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:51:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-20 21:51:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 21:51:12,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:51:12,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:51:12,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:12,780 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:51:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:51:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-20 21:51:12,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:51:12,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261541765] [2020-07-20 21:51:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:13,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:51:13,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:51:13,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 21:51:13,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:51:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:51:13,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:51:13,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261541765] [2020-07-20 21:51:13,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:51:13,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:51:13,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189153581] [2020-07-20 21:51:13,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:51:13,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:51:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:51:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:51:13,699 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-20 21:51:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:51:13,786 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-20 21:51:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:51:13,787 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-20 21:51:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:51:13,788 INFO L225 Difference]: With dead ends: 54 [2020-07-20 21:51:13,788 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:51:13,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:51:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:51:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 21:51:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 21:51:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-20 21:51:13,797 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-20 21:51:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:51:13,798 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-20 21:51:13,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:51:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-20 21:51:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 21:51:13,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:51:13,800 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:51:14,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:14,016 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:51:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:51:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-20 21:51:14,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:51:14,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994352430] [2020-07-20 21:51:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:15,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:51:15,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:51:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 62 conjunts are in the unsatisfiable core [2020-07-20 21:51:15,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:51:15,268 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:51:15,269 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:15,276 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:15,276 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:51:15,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-20 21:51:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:15,295 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-20 21:51:15,295 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:15,303 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:15,304 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:51:15,304 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-20 21:51:15,410 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:51:15,411 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:15,427 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:15,433 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:51:15,433 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:15,449 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:15,450 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:15,450 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:49 [2020-07-20 21:51:16,082 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 21:51:17,006 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 21:51:17,037 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:17,038 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2020-07-20 21:51:17,039 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:17,041 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:17,055 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:17,062 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2020-07-20 21:51:17,063 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:17,073 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:17,074 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:51:17,074 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:36 [2020-07-20 21:51:17,196 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:17,197 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:17,254 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 21:51:17,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:51:17,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:51:17,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:51:17,794 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:17,801 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:17,802 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:17,802 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:24 [2020-07-20 21:51:17,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994352430] [2020-07-20 21:51:17,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:51:17,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 21:51:17,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734121735] [2020-07-20 21:51:17,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:51:17,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:51:17,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:51:17,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:51:17,853 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 15 states. [2020-07-20 21:51:19,145 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:51:20,935 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:51:22,848 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:51:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:51:23,358 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-07-20 21:51:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:51:23,360 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-07-20 21:51:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:51:23,362 INFO L225 Difference]: With dead ends: 60 [2020-07-20 21:51:23,362 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 21:51:23,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-07-20 21:51:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 21:51:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-07-20 21:51:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 21:51:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-20 21:51:23,372 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-20 21:51:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:51:23,372 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-20 21:51:23,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:51:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-20 21:51:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 21:51:23,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:51:23,374 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] [2020-07-20 21:51:23,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:23,578 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:51:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:51:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1841731081, now seen corresponding path program 1 times [2020-07-20 21:51:23,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:51:23,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593062501] [2020-07-20 21:51:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:24,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:51:24,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:51:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:51:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:51:24,211 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:51:24,211 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:24,214 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:24,215 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:51:24,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-07-20 21:51:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 21:51:24,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:51:24,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:51:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 21:51:24,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593062501] [2020-07-20 21:51:24,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:51:24,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-20 21:51:24,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797699979] [2020-07-20 21:51:24,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:51:24,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:51:24,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:51:24,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:51:24,614 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 20 states. [2020-07-20 21:51:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:51:25,331 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-07-20 21:51:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 21:51:25,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-07-20 21:51:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:51:25,334 INFO L225 Difference]: With dead ends: 62 [2020-07-20 21:51:25,334 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 21:51:25,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 21:51:25,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 21:51:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-07-20 21:51:25,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 21:51:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-20 21:51:25,342 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 50 [2020-07-20 21:51:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:51:25,343 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-20 21:51:25,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:51:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-20 21:51:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 21:51:25,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:51:25,345 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:51:25,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:25,555 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:51:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:51:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-20 21:51:25,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:51:25,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51457819] [2020-07-20 21:51:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:51:26,464 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:51:26,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:51:26,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 102 conjunts are in the unsatisfiable core [2020-07-20 21:51:26,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:51:26,492 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:51:26,492 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:26,499 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:26,499 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:51:26,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-20 21:51:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:26,528 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-20 21:51:26,528 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:26,539 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:26,540 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:51:26,540 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-20 21:51:26,618 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:51:26,619 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:26,635 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:26,640 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:51:26,641 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:26,653 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:26,654 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:26,655 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2020-07-20 21:51:27,611 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:51:28,595 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:51:28,639 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:28,639 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 52 [2020-07-20 21:51:28,640 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:28,681 INFO L624 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2020-07-20 21:51:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:28,699 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:28,700 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 58 [2020-07-20 21:51:28,701 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:28,702 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:28,742 INFO L624 ElimStorePlain]: treesize reduction 24, result has 72.1 percent of original size [2020-07-20 21:51:28,743 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:51:28,743 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:68, output treesize:59 [2020-07-20 21:51:28,877 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:28,906 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:28,910 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:28,935 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:28,938 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:28,959 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:28,962 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:28,976 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:28,977 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:28,978 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-20 21:51:34,055 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:51:37,827 WARN L193 SmtUtils]: Spent 3.72 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:51:37,837 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:51:37,839 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:51:37,841 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:51:37,843 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:51:37,846 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:51:37,848 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:51:37,850 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:51:37,865 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:51:37,886 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:37,888 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 19 [2020-07-20 21:51:37,889 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:37,889 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:37,912 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:37,912 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-07-20 21:51:37,913 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:51:37,914 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:37,915 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:38,003 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:38,005 INFO L440 ElimStorePlain]: Different costs {4=[|v_old(#memory_$Pointer$.base)_AFTER_CALL_26|, |v_#memory_$Pointer$.offset_BEFORE_CALL_2|], 9=[|v_#memory_int_BEFORE_CALL_6|]} [2020-07-20 21:51:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:38,024 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 35 [2020-07-20 21:51:38,024 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:38,040 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:51:38,056 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:38,057 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 1 case distinctions, treesize of input 32 treesize of output 47 [2020-07-20 21:51:38,058 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:38,195 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-07-20 21:51:38,195 INFO L624 ElimStorePlain]: treesize reduction 20, result has 89.7 percent of original size [2020-07-20 21:51:38,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:38,217 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 24 treesize of output 27 [2020-07-20 21:51:38,217 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:38,234 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2020-07-20 21:51:38,235 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:38,301 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:38,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:38,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:38,329 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:38,330 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 44 [2020-07-20 21:51:38,331 INFO L544 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:51:38,350 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 30 treesize of output 18 [2020-07-20 21:51:38,351 INFO L544 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:38,463 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-07-20 21:51:38,464 INFO L624 ElimStorePlain]: treesize reduction 24, result has 85.8 percent of original size [2020-07-20 21:51:38,465 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 21:51:38,466 INFO L244 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:201, output treesize:139 [2020-07-20 21:51:38,949 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:39,066 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-07-20 21:51:39,067 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:51:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:51:39,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:51:39,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:51:39,630 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:51:39,801 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 21:51:39,909 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_100|, |v_#memory_$Pointer$.offset_93|], 2=[|v_#memory_int_92|], 3=[|v_#memory_$Pointer$.offset_94|, |v_#memory_$Pointer$.base_99|]} [2020-07-20 21:51:39,912 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:39,936 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:39,940 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:51:39,961 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:39,964 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:39,983 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:39,986 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:39,996 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:39,999 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:40,007 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:51:40,008 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-20 21:51:40,008 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:125, output treesize:59 [2020-07-20 21:51:40,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51457819] [2020-07-20 21:51:40,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:51:40,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 21:51:40,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073705794] [2020-07-20 21:51:40,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:51:40,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:51:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:51:40,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=674, Unknown=1, NotChecked=0, Total=756 [2020-07-20 21:51:40,095 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 21 states. [2020-07-20 21:51:52,298 WARN L193 SmtUtils]: Spent 8.30 s on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-07-20 21:52:00,809 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2020-07-20 21:52:13,514 WARN L193 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-07-20 21:52:25,960 WARN L193 SmtUtils]: Spent 9.57 s on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-07-20 21:52:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:52:27,104 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-20 21:52:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 21:52:27,104 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-07-20 21:52:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:52:27,106 INFO L225 Difference]: With dead ends: 66 [2020-07-20 21:52:27,106 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 21:52:27,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=213, Invalid=1589, Unknown=4, NotChecked=0, Total=1806 [2020-07-20 21:52:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 21:52:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2020-07-20 21:52:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 21:52:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-07-20 21:52:27,116 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-07-20 21:52:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:52:27,116 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-07-20 21:52:27,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:52:27,116 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-07-20 21:52:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 21:52:27,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:27,117 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:27,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:27,333 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 2 times [2020-07-20 21:52:27,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:27,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151367337] [2020-07-20 21:52:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:27,766 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:52:27,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:52:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 54 conjunts are in the unsatisfiable core [2020-07-20 21:52:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:52:27,796 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:52:27,796 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:27,800 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:27,800 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:52:27,800 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-07-20 21:52:27,878 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_96|], 2=[|v_#memory_$Pointer$.base_105|, |v_#memory_$Pointer$.base_103|]} [2020-07-20 21:52:27,882 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:52:27,883 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:27,897 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:27,898 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:27,909 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:27,911 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:52:27,919 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:27,920 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:52:27,920 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:60, output treesize:29 [2020-07-20 21:52:28,657 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 21:52:29,751 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 21:52:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:52:29,760 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:52:29,771 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:29,771 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 1 case distinctions, treesize of input 25 treesize of output 44 [2020-07-20 21:52:29,772 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:52:29,773 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:29,800 INFO L624 ElimStorePlain]: treesize reduction 12, result has 77.4 percent of original size [2020-07-20 21:52:29,800 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:52:29,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:37 [2020-07-20 21:52:29,985 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:52:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:52:30,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:52:30,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:52:30,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:52:30,746 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_117|], 3=[|v_#memory_$Pointer$.base_118|]} [2020-07-20 21:52:30,749 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:30,757 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:52:30,777 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:30,780 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:52:30,784 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:52:30,797 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:52:30,798 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-07-20 21:52:30,798 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:109, output treesize:51 [2020-07-20 21:52:34,445 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:52:34,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151367337] [2020-07-20 21:52:34,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:52:34,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 21:52:34,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17943741] [2020-07-20 21:52:34,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:52:34,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:52:34,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:52:34,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:52:34,452 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 20 states. [2020-07-20 21:52:35,320 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 21:52:37,262 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:52:38,393 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 21:52:39,516 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 21:52:41,510 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:52:42,559 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:52:50,005 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-20 21:53:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:53:08,293 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-07-20 21:53:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 21:53:08,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-07-20 21:53:08,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:53:08,296 INFO L225 Difference]: With dead ends: 65 [2020-07-20 21:53:08,296 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 21:53:08,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 21:53:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 21:53:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-07-20 21:53:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 21:53:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-20 21:53:08,305 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2020-07-20 21:53:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:53:08,306 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-20 21:53:08,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:53:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-20 21:53:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 21:53:08,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:53:08,307 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:53:08,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:53:08,513 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:53:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:53:08,514 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-20 21:53:08,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:53:08,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160285910] [2020-07-20 21:53:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 21:53:09,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:53:09,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:53:09,601 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:53:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:53:09,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:53:09,736 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:53:09,737 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:53:09,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:53:10,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:53:10 BoogieIcfgContainer [2020-07-20 21:53:10,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:53:10,013 INFO L168 Benchmark]: Toolchain (without parser) took 121526.24 ms. Allocated memory was 137.9 MB in the beginning and 341.3 MB in the end (delta: 203.4 MB). Free memory was 101.4 MB in the beginning and 223.1 MB in the end (delta: -121.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:10,014 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:53:10,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 685.69 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 101.0 MB in the beginning and 170.2 MB in the end (delta: -69.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:10,015 INFO L168 Benchmark]: Boogie Preprocessor took 76.67 ms. Allocated memory is still 203.4 MB. Free memory was 170.2 MB in the beginning and 166.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:10,015 INFO L168 Benchmark]: RCFGBuilder took 639.57 ms. Allocated memory is still 203.4 MB. Free memory was 166.8 MB in the beginning and 122.4 MB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:10,016 INFO L168 Benchmark]: TraceAbstraction took 120117.11 ms. Allocated memory was 203.4 MB in the beginning and 341.3 MB in the end (delta: 137.9 MB). Free memory was 121.7 MB in the beginning and 223.1 MB in the end (delta: -101.4 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:10,018 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 685.69 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 101.0 MB in the beginning and 170.2 MB in the end (delta: -69.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.67 ms. Allocated memory is still 203.4 MB. Free memory was 170.2 MB in the beginning and 166.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 639.57 ms. Allocated memory is still 203.4 MB. Free memory was 166.8 MB in the beginning and 122.4 MB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 120117.11 ms. Allocated memory was 203.4 MB in the beginning and 341.3 MB in the end (delta: 137.9 MB). Free memory was 121.7 MB in the beginning and 223.1 MB in the end (delta: -101.4 MB). Peak memory consumption was 36.5 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)=6, \old(head)=10, head={0:0}] [L543] int i; [L544] mlist *mylist, *temp; VAL [\old(head)=0, \old(head)=0, head={0:0}] [L545] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={11:12}, l={33655:0}, malloc(sizeof(mlist))={33655:0}] [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={33655:0}, l={11:12}, malloc(sizeof(mlist))={33655:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={33655:0}, k=2, l={33655:0}, l={11:12}, malloc(sizeof(mlist))={33655:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={33655:0}, insert_list(mylist,2)=0, mylist={11:12}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=33655, \old(head)=0, \old(k)=5, head={33655:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=33655, \old(head)=0, \old(k)=5, head={33655:0}, k=5, l={33658:0}, l={11:12}, malloc(sizeof(mlist))={33658:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=33655, \old(k)=5, head={33655:0}, k=5, l={11:12}, l={33658:0}, malloc(sizeof(mlist))={33658:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=33655, \old(k)=5, \result=0, head={33658:0}, k=5, l={11:12}, l={33658:0}, malloc(sizeof(mlist))={33658:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={33658:0}, insert_list(mylist,5)=0, mylist={11:12}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=33658, \old(k)=1, head={33658:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=33658, \old(k)=1, head={33658:0}, k=1, l={33657:0}, l={11:12}, malloc(sizeof(mlist))={33657:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=33658, \old(head)=0, \old(k)=1, head={33658:0}, k=1, l={33657:0}, l={11:12}, malloc(sizeof(mlist))={33657:0}] [L539] head = l [L540] return 0; VAL [\old(head)=33658, \old(head)=0, \old(k)=1, \result=0, head={33657:0}, k=1, l={33657:0}, l={11:12}, malloc(sizeof(mlist))={33657:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={33657:0}, insert_list(mylist,1)=0, mylist={11:12}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=33657, \old(head)=0, \old(k)=3, head={33657:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=33657, \old(k)=3, head={33657:0}, k=3, l={33654:0}, l={11:12}, malloc(sizeof(mlist))={33654:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=33657, \old(head)=0, \old(k)=3, head={33657:0}, k=3, l={33654:0}, l={11:12}, malloc(sizeof(mlist))={33654:0}] [L539] head = l [L540] return 0; VAL [\old(head)=33657, \old(head)=0, \old(k)=3, \result=0, head={33654:0}, k=3, l={33654:0}, l={11:12}, malloc(sizeof(mlist))={33654:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={33654:0}, insert_list(mylist,3)=0, mylist={11:12}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={33654:0}, l={33654:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={33654:0}, k=2, l={33654:0}, l={33654:0}] [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={33654:0}, k=2, l={33654:0}, l={33654:0}, 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={33654:0}, k=2, l={33654:0}, l={33657:0}, 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={33654:0}, k=2, l={33658:0}, l={33654:0}, 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={33654:0}, k=2, l={33655:0}, l={33654:0}, 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={33655:0}, head={33654:0}, k=2, l={33655:0}, l={33654:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={33654:0}, mylist={11:12}, search_list(head,2)={33655:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={33654:0}, mylist={11:12}, temp={33655:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={33654:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={33654:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={33654:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 119.9s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 87.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 194 SDtfs, 429 SDslu, 636 SDs, 0 SdLazy, 1849 SolverSat, 287 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 27.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 580 GetRequests, 391 SyntacticMatches, 3 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 79.8s 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, 48 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 23.9s InterpolantComputationTime, 401 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 431 ConstructedInterpolants, 12 QuantifiedInterpolants, 294333 SizeOfPredicates, 99 NumberOfNonLiveVariables, 2005 ConjunctsInSsa, 292 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 216/297 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...