/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/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:50:08,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:50:08,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:50:08,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:50:08,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:50:08,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:50:08,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:50:08,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:50:08,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:50:08,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:50:08,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:50:08,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:50:08,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:50:08,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:50:08,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:50:08,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:50:08,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:50:08,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:50:08,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:50:08,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:50:08,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:50:08,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:50:08,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:50:08,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:50:08,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:50:08,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:50:08,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:50:08,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:50:08,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:50:08,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:50:08,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:50:08,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:50:08,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:50:08,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:50:08,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:50:08,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:50:08,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:50:08,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:50:08,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:50:08,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:50:08,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:50:08,139 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 21:50:08,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:50:08,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:50:08,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:50:08,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:50:08,163 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:50:08,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:50:08,163 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:50:08,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:50:08,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:50:08,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:50:08,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:50:08,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:50:08,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:50:08,166 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:50:08,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:50:08,166 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:50:08,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:50:08,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:50:08,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:50:08,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:50:08,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:50:08,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:50:08,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:50:08,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:50:08,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:50:08,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:50:08,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:08,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:50:08,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:50:08,170 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 21:50:08,460 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:50:08,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:50:08,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:50:08,489 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:50:08,489 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:50:08,490 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-07-20 21:50:08,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7e5d350/d5fa7776de364984bf8db7da598c82f0/FLAG0b7710a65 [2020-07-20 21:50:09,140 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:50:09,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-07-20 21:50:09,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7e5d350/d5fa7776de364984bf8db7da598c82f0/FLAG0b7710a65 [2020-07-20 21:50:09,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7e5d350/d5fa7776de364984bf8db7da598c82f0 [2020-07-20 21:50:09,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:50:09,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:50:09,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:50:09,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:50:09,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:50:09,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:50:09" (1/1) ... [2020-07-20 21:50:09,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b42482a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:09, skipping insertion in model container [2020-07-20 21:50:09,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:50:09" (1/1) ... [2020-07-20 21:50:09,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:50:09,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:50:10,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:50:10,042 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:50:10,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:50:10,162 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:50:10,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10 WrapperNode [2020-07-20 21:50:10,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:50:10,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:50:10,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:50:10,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:50:10,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (1/1) ... [2020-07-20 21:50:10,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (1/1) ... [2020-07-20 21:50:10,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (1/1) ... [2020-07-20 21:50:10,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (1/1) ... [2020-07-20 21:50:10,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (1/1) ... [2020-07-20 21:50:10,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (1/1) ... [2020-07-20 21:50:10,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (1/1) ... [2020-07-20 21:50:10,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:50:10,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:50:10,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:50:10,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:50:10,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (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 21:50:10,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:50:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:50:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 21:50:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 21:50:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-20 21:50:10,326 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-07-20 21:50:10,326 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-07-20 21:50:10,326 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-07-20 21:50:10,327 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-07-20 21:50:10,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-07-20 21:50:10,327 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-07-20 21:50:10,327 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-07-20 21:50:10,327 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-07-20 21:50:10,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:50:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:50:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 21:50:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 21:50:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 21:50:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 21:50:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 21:50:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 21:50:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 21:50:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 21:50:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 21:50:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 21:50:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 21:50:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 21:50:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 21:50:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 21:50:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 21:50:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 21:50:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 21:50:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 21:50:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 21:50:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 21:50:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 21:50:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 21:50:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 21:50:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 21:50:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 21:50:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 21:50:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 21:50:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 21:50:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 21:50:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 21:50:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 21:50:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 21:50:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 21:50:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 21:50:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 21:50:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 21:50:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 21:50:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 21:50:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 21:50:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 21:50:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 21:50:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 21:50:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 21:50:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 21:50:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 21:50:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 21:50:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 21:50:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 21:50:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 21:50:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 21:50:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 21:50:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 21:50:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 21:50:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 21:50:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 21:50:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 21:50:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 21:50:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 21:50:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 21:50:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 21:50:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 21:50:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 21:50:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 21:50:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 21:50:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 21:50:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 21:50:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 21:50:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 21:50:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 21:50:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 21:50:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 21:50:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 21:50:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 21:50:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 21:50:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 21:50:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 21:50:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 21:50:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 21:50:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 21:50:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 21:50:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 21:50:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 21:50:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 21:50:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 21:50:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 21:50:10,343 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 21:50:10,343 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 21:50:10,343 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 21:50:10,343 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 21:50:10,343 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 21:50:10,343 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 21:50:10,343 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 21:50:10,344 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 21:50:10,344 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 21:50:10,344 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 21:50:10,344 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 21:50:10,344 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 21:50:10,344 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 21:50:10,344 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 21:50:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 21:50:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 21:50:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 21:50:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:50:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-20 21:50:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-07-20 21:50:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 21:50:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:50:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-07-20 21:50:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:50:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-07-20 21:50:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:50:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 21:50:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:50:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-07-20 21:50:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-07-20 21:50:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-07-20 21:50:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-07-20 21:50:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-07-20 21:50:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:50:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:50:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:50:11,195 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:50:11,195 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-20 21:50:11,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:50:11 BoogieIcfgContainer [2020-07-20 21:50:11,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:50:11,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:50:11,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:50:11,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:50:11,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:50:09" (1/3) ... [2020-07-20 21:50:11,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8b88b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:50:11, skipping insertion in model container [2020-07-20 21:50:11,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:10" (2/3) ... [2020-07-20 21:50:11,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8b88b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:50:11, skipping insertion in model container [2020-07-20 21:50:11,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:50:11" (3/3) ... [2020-07-20 21:50:11,224 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-07-20 21:50:11,235 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:50:11,243 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:50:11,258 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:50:11,280 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:50:11,280 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:50:11,280 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:50:11,281 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:50:11,281 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:50:11,281 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:50:11,281 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:50:11,281 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:50:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-07-20 21:50:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:50:11,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:50:11,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:50:11,314 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:50:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:50:11,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1243342133, now seen corresponding path program 1 times [2020-07-20 21:50:11,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:50:11,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281621585] [2020-07-20 21:50:11,331 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 21:50:11,586 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:50:11,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:50:11,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 21:50:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:50:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:50:11,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:50:11,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281621585] [2020-07-20 21:50:11,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:50:11,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 21:50:11,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456354678] [2020-07-20 21:50:11,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 21:50:11,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:50:11,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 21:50:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:50:11,671 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 2 states. [2020-07-20 21:50:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:50:11,763 INFO L93 Difference]: Finished difference Result 224 states and 366 transitions. [2020-07-20 21:50:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 21:50:11,766 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-20 21:50:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:50:11,780 INFO L225 Difference]: With dead ends: 224 [2020-07-20 21:50:11,780 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 21:50:11,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:50:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 21:50:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-20 21:50:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 21:50:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-07-20 21:50:11,850 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 24 [2020-07-20 21:50:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:50:11,851 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-07-20 21:50:11,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 21:50:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-07-20 21:50:11,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 21:50:11,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:50:11,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 21:50:12,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:12,069 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:50:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:50:12,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2076611886, now seen corresponding path program 1 times [2020-07-20 21:50:12,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:50:12,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997294814] [2020-07-20 21:50:12,070 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 21:50:12,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:50:12,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:50:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 85 conjunts are in the unsatisfiable core [2020-07-20 21:50:12,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:50:12,650 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-20 21:50:12,651 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-07-20 21:50:12,652 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:12,661 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:12,662 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:12,662 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:17 [2020-07-20 21:50:12,701 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:12,702 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 21:50:12,703 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:12,708 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:12,709 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:12,710 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2020-07-20 21:50:12,747 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-20 21:50:12,748 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:12,750 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:12,751 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:12,751 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:1 [2020-07-20 21:50:12,847 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:12,848 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 35 treesize of output 39 [2020-07-20 21:50:12,849 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:12,860 INFO L624 ElimStorePlain]: treesize reduction 16, result has 42.9 percent of original size [2020-07-20 21:50:12,861 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 21:50:12,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:8 [2020-07-20 21:50:12,940 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-07-20 21:50:12,941 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 19 [2020-07-20 21:50:12,943 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:12,959 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:12,960 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:50:12,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2020-07-20 21:50:13,119 INFO L350 Elim1Store]: treesize reduction 24, result has 68.0 percent of original size [2020-07-20 21:50:13,120 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 65 [2020-07-20 21:50:13,123 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:13,161 INFO L624 ElimStorePlain]: treesize reduction 28, result has 60.0 percent of original size [2020-07-20 21:50:13,162 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:50:13,163 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:42 [2020-07-20 21:50:13,243 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-20 21:50:13,244 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:13,256 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:13,285 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:13,285 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2020-07-20 21:50:13,287 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:13,297 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:13,298 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:13,299 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:42, output treesize:3 [2020-07-20 21:50:15,500 WARN L860 $PredicateComparison]: unable to prove that (exists ((chain_node_~node~0.base Int)) (and (= |c_#memory_$Pointer$.base| (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| chain_node_~node~0.base (let ((.cse1 (store (store (select |c_old(#memory_$Pointer$.base)| chain_node_~node~0.base) 0 0) 4 0))) (store .cse1 0 (select (select (store |c_old(#memory_$Pointer$.base)| chain_node_~node~0.base .cse1) |c_chain_node_#in~ppnode.base|) |c_chain_node_#in~ppnode.offset|)))))) (store .cse0 |c_chain_node_#in~ppnode.base| (store (select .cse0 |c_chain_node_#in~ppnode.base|) |c_chain_node_#in~ppnode.offset| chain_node_~node~0.base)))) (<= (+ chain_node_~node~0.base 1) |c_#StackHeapBarrier|))) is different from true [2020-07-20 21:50:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:50:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:50:15,830 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-07-20 21:50:15,833 INFO L350 Elim1Store]: treesize reduction 102, result has 66.8 percent of original size [2020-07-20 21:50:15,833 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 236 [2020-07-20 21:50:15,838 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:15,963 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-07-20 21:50:15,964 INFO L624 ElimStorePlain]: treesize reduction 132, result has 40.0 percent of original size [2020-07-20 21:50:15,968 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:15,969 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:15,976 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:15,979 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 21:50:15,980 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:113, output treesize:109 [2020-07-20 21:50:15,981 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:15,982 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:15,984 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,066 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,068 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,075 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,251 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,253 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,257 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,428 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,429 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,432 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,590 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,591 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,595 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,774 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,775 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,778 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,782 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,783 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,786 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,791 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,791 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,794 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,798 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,799 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,801 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,805 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,806 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,809 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,813 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,814 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,816 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,820 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,821 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,823 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,827 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,827 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,829 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:50:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:50:16,908 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:16,909 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2020-07-20 21:50:16,910 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:16,918 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:50:16,919 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:50:16,926 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:16,927 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 16 treesize of output 18 [2020-07-20 21:50:16,928 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:16,934 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 21:50:16,935 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:16,947 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:16,948 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 16 treesize of output 18 [2020-07-20 21:50:16,948 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:16,967 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:16,968 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 16 treesize of output 18 [2020-07-20 21:50:16,969 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:50:16,977 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2020-07-20 21:50:16,978 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:16,994 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:16,996 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:50:16,996 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:412, output treesize:64 [2020-07-20 21:50:17,079 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:17,080 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 43 [2020-07-20 21:50:17,082 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:50:17,089 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:17,095 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:17,096 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 21:50:17,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:4 [2020-07-20 21:50:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-20 21:50:17,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:50:17,812 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:50:18,089 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:50:18,095 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 21:50:18,288 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-20 21:50:18,290 INFO L624 ElimStorePlain]: treesize reduction 803, result has 5.0 percent of original size [2020-07-20 21:50:18,293 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 1] term [2020-07-20 21:50:18,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:50:18,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:50:18,296 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 21:50:18,297 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:1917, output treesize:39 [2020-07-20 21:50:18,298 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 1] term [2020-07-20 21:50:18,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:50:18,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:50:18,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997294814] [2020-07-20 21:50:18,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:50:18,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 21:50:18,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558489326] [2020-07-20 21:50:18,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 21:50:18,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:50:18,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 21:50:18,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=593, Unknown=1, NotChecked=48, Total=702 [2020-07-20 21:50:18,365 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 25 states. [2020-07-20 21:50:20,960 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:50:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:50:32,562 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2020-07-20 21:50:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 21:50:32,563 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-07-20 21:50:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:50:32,570 INFO L225 Difference]: With dead ends: 180 [2020-07-20 21:50:32,570 INFO L226 Difference]: Without dead ends: 177 [2020-07-20 21:50:32,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=153, Invalid=1571, Unknown=2, NotChecked=80, Total=1806 [2020-07-20 21:50:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-20 21:50:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 133. [2020-07-20 21:50:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-20 21:50:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2020-07-20 21:50:32,595 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 49 [2020-07-20 21:50:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:50:32,596 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2020-07-20 21:50:32,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 21:50:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2020-07-20 21:50:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 21:50:32,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:50:32,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2020-07-20 21:50:32,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:32,800 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:50:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:50:32,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1536063324, now seen corresponding path program 1 times [2020-07-20 21:50:32,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:50:32,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043785597] [2020-07-20 21:50:32,802 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 21:50:33,204 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:50:33,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:50:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 94 conjunts are in the unsatisfiable core [2020-07-20 21:50:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:50:33,233 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-20 21:50:33,234 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 19 treesize of output 18 [2020-07-20 21:50:33,234 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,248 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:33,248 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:27 [2020-07-20 21:50:33,277 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 21:50:33,278 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,286 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:33,287 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:3 [2020-07-20 21:50:33,318 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-20 21:50:33,319 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,327 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:33,328 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,328 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:1 [2020-07-20 21:50:33,420 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:33,421 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 35 treesize of output 39 [2020-07-20 21:50:33,422 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,429 INFO L624 ElimStorePlain]: treesize reduction 16, result has 42.9 percent of original size [2020-07-20 21:50:33,430 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 21:50:33,430 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:8 [2020-07-20 21:50:33,497 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-07-20 21:50:33,498 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 19 [2020-07-20 21:50:33,499 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,516 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:33,517 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,517 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-07-20 21:50:33,608 INFO L350 Elim1Store]: treesize reduction 24, result has 68.0 percent of original size [2020-07-20 21:50:33,609 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 65 [2020-07-20 21:50:33,611 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,646 INFO L624 ElimStorePlain]: treesize reduction 28, result has 60.0 percent of original size [2020-07-20 21:50:33,647 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-07-20 21:50:33,698 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-20 21:50:33,698 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,711 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:33,761 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:33,761 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2020-07-20 21:50:33,762 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,772 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:33,773 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:33,773 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:42, output treesize:3 [2020-07-20 21:50:35,939 WARN L860 $PredicateComparison]: unable to prove that (exists ((chain_node_~node~0.base Int)) (and (= |c_#memory_$Pointer$.base| (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| chain_node_~node~0.base (let ((.cse1 (store (store (select |c_old(#memory_$Pointer$.base)| chain_node_~node~0.base) 0 0) 4 0))) (store .cse1 0 (select (select (store |c_old(#memory_$Pointer$.base)| chain_node_~node~0.base .cse1) |c_chain_node_#in~ppnode.base|) |c_chain_node_#in~ppnode.offset|)))))) (store .cse0 |c_chain_node_#in~ppnode.base| (store (select .cse0 |c_chain_node_#in~ppnode.base|) |c_chain_node_#in~ppnode.offset| chain_node_~node~0.base)))) (<= (+ chain_node_~node~0.base 1) |c_#StackHeapBarrier|))) is different from true [2020-07-20 21:50:35,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:50:35,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:50:36,221 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-07-20 21:50:36,222 INFO L350 Elim1Store]: treesize reduction 102, result has 66.8 percent of original size [2020-07-20 21:50:36,223 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 236 [2020-07-20 21:50:36,224 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:36,343 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-07-20 21:50:36,345 INFO L624 ElimStorePlain]: treesize reduction 132, result has 40.0 percent of original size [2020-07-20 21:50:36,346 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,347 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,349 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,350 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:50:36,351 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:113, output treesize:109 [2020-07-20 21:50:36,351 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,352 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,353 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,418 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,419 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,421 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,582 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,583 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,584 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,726 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,727 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,728 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,866 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,867 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:36,868 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,016 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,017 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,018 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,020 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,020 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,021 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,023 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,024 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,025 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,026 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,027 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,028 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,029 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,030 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,031 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,032 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,033 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,034 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,035 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,036 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,037 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,038 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 21:50:37,039 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,040 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 21:50:37,114 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:37,115 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 16 treesize of output 26 [2020-07-20 21:50:37,116 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:37,150 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:37,152 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 21:50:37,153 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:103, output treesize:96 [2020-07-20 21:50:37,237 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:37,238 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 88 treesize of output 59 [2020-07-20 21:50:37,240 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 21:50:37,241 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:37,247 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:37,248 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:37,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:100, output treesize:4 [2020-07-20 21:50:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-20 21:50:37,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:50:37,891 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 21:50:38,159 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:50:38,168 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 21:50:38,494 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 32 [2020-07-20 21:50:38,495 INFO L624 ElimStorePlain]: treesize reduction 5295, result has 0.8 percent of original size [2020-07-20 21:50:38,496 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 1] term [2020-07-20 21:50:38,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:50:38,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:50:38,498 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 21:50:38,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:1917, output treesize:39 [2020-07-20 21:50:38,499 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 1] term [2020-07-20 21:50:38,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:50:38,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:50:38,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043785597] [2020-07-20 21:50:38,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:50:38,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 21:50:38,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955271005] [2020-07-20 21:50:38,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 21:50:38,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:50:38,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 21:50:38,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=593, Unknown=1, NotChecked=48, Total=702 [2020-07-20 21:50:38,574 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand 25 states. [2020-07-20 21:50:41,331 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:50:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:50:48,614 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2020-07-20 21:50:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 21:50:48,615 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-07-20 21:50:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:50:48,619 INFO L225 Difference]: With dead ends: 179 [2020-07-20 21:50:48,619 INFO L226 Difference]: Without dead ends: 176 [2020-07-20 21:50:48,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=153, Invalid=1571, Unknown=2, NotChecked=80, Total=1806 [2020-07-20 21:50:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-20 21:50:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 133. [2020-07-20 21:50:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-20 21:50:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2020-07-20 21:50:48,639 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 51 [2020-07-20 21:50:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:50:48,640 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2020-07-20 21:50:48,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 21:50:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2020-07-20 21:50:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 21:50:48,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:50:48,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-07-20 21:50:48,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:48,851 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:50:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:50:48,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1614179064, now seen corresponding path program 1 times [2020-07-20 21:50:48,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:50:48,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320578637] [2020-07-20 21:50:48,853 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 21:50:49,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:50:49,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:50:49,164 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:50:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:50:49,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:50:49,250 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:50:49,250 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:50:49,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:49,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:50:49 BoogieIcfgContainer [2020-07-20 21:50:49,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:50:49,518 INFO L168 Benchmark]: Toolchain (without parser) took 40108.98 ms. Allocated memory was 137.4 MB in the beginning and 356.0 MB in the end (delta: 218.6 MB). Free memory was 99.4 MB in the beginning and 201.2 MB in the end (delta: -101.7 MB). Peak memory consumption was 116.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:49,518 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:50:49,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 751.32 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 99.0 MB in the beginning and 167.7 MB in the end (delta: -68.7 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:49,520 INFO L168 Benchmark]: Boogie Preprocessor took 87.58 ms. Allocated memory is still 202.4 MB. Free memory was 167.7 MB in the beginning and 163.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:49,520 INFO L168 Benchmark]: RCFGBuilder took 952.38 ms. Allocated memory is still 202.4 MB. Free memory was 163.6 MB in the beginning and 100.3 MB in the end (delta: 63.3 MB). Peak memory consumption was 63.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:49,521 INFO L168 Benchmark]: TraceAbstraction took 38309.77 ms. Allocated memory was 202.4 MB in the beginning and 356.0 MB in the end (delta: 153.6 MB). Free memory was 99.7 MB in the beginning and 201.2 MB in the end (delta: -101.5 MB). Peak memory consumption was 52.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:49,524 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 751.32 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 99.0 MB in the beginning and 167.7 MB in the end (delta: -68.7 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.58 ms. Allocated memory is still 202.4 MB. Free memory was 167.7 MB in the beginning and 163.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 952.38 ms. Allocated memory is still 202.4 MB. Free memory was 163.6 MB in the beginning and 100.3 MB in the end (delta: 63.3 MB). Peak memory consumption was 63.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 38309.77 ms. Allocated memory was 202.4 MB in the beginning and 356.0 MB in the end (delta: 153.6 MB). Free memory was 99.7 MB in the beginning and 201.2 MB in the end (delta: -101.5 MB). Peak memory consumption was 52.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L628] const struct node *p1, *p2; VAL [p1={20696:0}, p2={20695:0}] [L629] CALL, EXPR create_sll(&p1, &p2) VAL [pp1={20696:0}, pp2={20695:0}] [L577] struct node *list = ((void *)0); VAL [list={20697:0}, pp1={20696:0}, pp1={20696:0}, pp2={20695:0}, pp2={20695:0}] [L579] CALL chain_node(&list) VAL [ppnode={20697:0}] [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); VAL [malloc(sizeof *ptr)={-2:0}, ptr={-2:0}] [L563] COND FALSE !(!ptr) VAL [malloc(sizeof *ptr)={-2:0}, ptr={-2:0}] [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; VAL [\result={-2:0}, malloc(sizeof *ptr)={-2:0}, ptr={-2:0}] [L571] RET, EXPR alloc_node() VAL [alloc_node()={-2:0}, ppnode={20697:0}, ppnode={20697:0}] [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node VAL [node={-2:0}, ppnode={20697:0}, ppnode={20697:0}] [L579] RET chain_node(&list) VAL [list={20697:0}, pp1={20696:0}, pp1={20696:0}, pp2={20695:0}, pp2={20695:0}] [L580] COND FALSE !(__VERIFIER_nondet_int()) [L581] EXPR \read(*list) [L581] *pp2 = list [L582] COND FALSE !(__VERIFIER_nondet_int()) [L584] EXPR \read(*list) [L584] *pp1 = list [L586] CALL chain_node(&list) VAL [ppnode={20697:0}] [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); VAL [malloc(sizeof *ptr)={-1:0}, ptr={-1:0}] [L563] COND FALSE !(!ptr) VAL [malloc(sizeof *ptr)={-1:0}, ptr={-1:0}] [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; VAL [\result={-1:0}, malloc(sizeof *ptr)={-1:0}, ptr={-1:0}] [L571] RET, EXPR alloc_node() VAL [alloc_node()={-1:0}, ppnode={20697:0}, ppnode={20697:0}] [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node VAL [node={-1:0}, ppnode={20697:0}, ppnode={20697:0}] [L586] RET chain_node(&list) VAL [list={20697:0}, pp1={20696:0}, pp1={20696:0}, pp2={20695:0}, pp2={20695:0}] [L587] COND FALSE !(__VERIFIER_nondet_int()) [L588] EXPR \read(*list) [L588] return list; [L577] struct node *list = ((void *)0); [L588] return list; VAL [\result={-1:0}, pp1={20696:0}, pp1={20696:0}, pp2={20695:0}, pp2={20695:0}] [L629] RET, EXPR create_sll(&p1, &p2) VAL [create_sll(&p1, &p2)={-1:0}, p1={20696:0}, p2={20695:0}] [L629] struct node *list = create_sll(&p1, &p2); [L631] EXPR \read(*p1) [L631] EXPR \read(*p2) VAL [\read(*p1)={-2:0}, \read(*p2)={-2:0}, list={-1:0}, p1={20696:0}, p2={20695:0}] [L631] CALL check_seq_next(p1, p2) VAL [beg={-2:0}, end={-2:0}] [L615] COND FALSE !(!(beg)) VAL [beg={-2:0}, beg={-2:0}, end={-2:0}, end={-2:0}] [L616] COND FALSE !(!(end)) VAL [beg={-2:0}, beg={-2:0}, end={-2:0}, end={-2:0}] [L617] EXPR beg->next [L617] beg = beg->next [L617] COND TRUE end != beg VAL [beg={0:0}, beg={-2:0}, end={-2:0}, end={-2:0}] [L618] COND TRUE !(beg) VAL [beg={0:0}, beg={-2:0}, end={-2:0}, end={-2:0}] [L618] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 38.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 24.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 335 SDtfs, 382 SDslu, 1623 SDs, 0 SdLazy, 3809 SolverSat, 233 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 13.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=2, 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, 3 MinimizatonAttempts, 87 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 179 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 121 ConstructedInterpolants, 24 QuantifiedInterpolants, 141621 SizeOfPredicates, 55 NumberOfNonLiveVariables, 648 ConjunctsInSsa, 180 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 8/20 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...