/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:38:52,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:38:52,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:38:52,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:38:52,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:38:52,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:38:52,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:38:52,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:38:52,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:38:52,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:38:52,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:38:52,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:38:52,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:38:52,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:38:52,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:38:52,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:38:52,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:38:52,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:38:52,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:38:52,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:38:52,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:38:52,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:38:52,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:38:52,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:38:52,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:38:52,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:38:52,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:38:52,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:38:52,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:38:52,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:38:52,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:38:52,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:38:52,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:38:52,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:38:52,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:38:52,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:38:52,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:38:52,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:38:52,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:38:52,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:38:52,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:38:52,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:38:52,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:38:52,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:38:52,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:38:52,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:38:52,307 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:38:52,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:38:52,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:38:52,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:38:52,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:38:52,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:38:52,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:38:52,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:38:52,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:38:52,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:38:52,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:38:52,313 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:38:52,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:38:52,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:38:52,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:38:52,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:38:52,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:38:52,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:38:52,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:38:52,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:38:52,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:38:52,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:38:52,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:38:52,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:38:52,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:38:52,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:38:52,764 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:38:52,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:38:52,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:38:52,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:38:52,806 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:38:52,807 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 13:38:52,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020896235/5f0e6f450d5149ed8b4e3e64422acdbc/FLAG636a8430e [2020-07-21 13:38:53,796 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:38:53,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 13:38:53,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020896235/5f0e6f450d5149ed8b4e3e64422acdbc/FLAG636a8430e [2020-07-21 13:38:53,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020896235/5f0e6f450d5149ed8b4e3e64422acdbc [2020-07-21 13:38:53,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:38:53,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:38:53,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:38:53,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:38:53,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:38:53,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:53" (1/1) ... [2020-07-21 13:38:53,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f19b831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:53, skipping insertion in model container [2020-07-21 13:38:53,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:53" (1/1) ... [2020-07-21 13:38:53,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:38:54,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:38:54,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:38:54,837 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:38:54,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:38:54,981 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:38:54,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54 WrapperNode [2020-07-21 13:38:54,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:38:54,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:38:54,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:38:54,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:38:55,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (1/1) ... [2020-07-21 13:38:55,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (1/1) ... [2020-07-21 13:38:55,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (1/1) ... [2020-07-21 13:38:55,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (1/1) ... [2020-07-21 13:38:55,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (1/1) ... [2020-07-21 13:38:55,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (1/1) ... [2020-07-21 13:38:55,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (1/1) ... [2020-07-21 13:38:55,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:38:55,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:38:55,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:38:55,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:38:55,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:38:55,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:38:55,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:38:55,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 13:38:55,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 13:38:55,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 13:38:55,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 13:38:55,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 13:38:55,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 13:38:55,185 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-21 13:38:55,185 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-21 13:38:55,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:38:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:38:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 13:38:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 13:38:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 13:38:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 13:38:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 13:38:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 13:38:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 13:38:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 13:38:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 13:38:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 13:38:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 13:38:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 13:38:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 13:38:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 13:38:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 13:38:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 13:38:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 13:38:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 13:38:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 13:38:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 13:38:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 13:38:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 13:38:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 13:38:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 13:38:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 13:38:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 13:38:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 13:38:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 13:38:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 13:38:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 13:38:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 13:38:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 13:38:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 13:38:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 13:38:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 13:38:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 13:38:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 13:38:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 13:38:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 13:38:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 13:38:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 13:38:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 13:38:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 13:38:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 13:38:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 13:38:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 13:38:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 13:38:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 13:38:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 13:38:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 13:38:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 13:38:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 13:38:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 13:38:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 13:38:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 13:38:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 13:38:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:38:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 13:38:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 13:38:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 13:38:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 13:38:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 13:38:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 13:38:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 13:38:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 13:38:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 13:38:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 13:38:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 13:38:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 13:38:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 13:38:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 13:38:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 13:38:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 13:38:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 13:38:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 13:38:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 13:38:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 13:38:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 13:38:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 13:38:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 13:38:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 13:38:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 13:38:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 13:38:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 13:38:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 13:38:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 13:38:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 13:38:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 13:38:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 13:38:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 13:38:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 13:38:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 13:38:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 13:38:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 13:38:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 13:38:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 13:38:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 13:38:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 13:38:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 13:38:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 13:38:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 13:38:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 13:38:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 13:38:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 13:38:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 13:38:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 13:38:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 13:38:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 13:38:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-21 13:38:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:38:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 13:38:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-21 13:38:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 13:38:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:38:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 13:38:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:38:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:38:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:38:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:38:56,030 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:38:56,031 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 13:38:56,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:56 BoogieIcfgContainer [2020-07-21 13:38:56,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:38:56,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:38:56,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:38:56,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:38:56,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:38:53" (1/3) ... [2020-07-21 13:38:56,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7698dcae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:56, skipping insertion in model container [2020-07-21 13:38:56,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:54" (2/3) ... [2020-07-21 13:38:56,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7698dcae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:56, skipping insertion in model container [2020-07-21 13:38:56,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:56" (3/3) ... [2020-07-21 13:38:56,058 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-21 13:38:56,077 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:38:56,094 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:38:56,116 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:38:56,149 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:38:56,150 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:38:56,150 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:38:56,150 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:38:56,150 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:38:56,151 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:38:56,151 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:38:56,151 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:38:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-21 13:38:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 13:38:56,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:38:56,199 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:38:56,200 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:38:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:38:56,211 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-21 13:38:56,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:38:56,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247191054] [2020-07-21 13:38:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:38:56,780 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:38:56,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:38:56,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 13:38:56,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:38:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 13:38:56,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:38:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 13:38:57,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247191054] [2020-07-21 13:38:57,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:38:57,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-21 13:38:57,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388118154] [2020-07-21 13:38:57,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 13:38:57,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:38:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 13:38:57,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:38:57,187 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-07-21 13:38:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:38:57,676 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-07-21 13:38:57,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:38:57,679 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-07-21 13:38:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:38:57,697 INFO L225 Difference]: With dead ends: 95 [2020-07-21 13:38:57,698 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 13:38:57,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:38:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 13:38:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-21 13:38:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 13:38:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-21 13:38:57,790 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-07-21 13:38:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:38:57,791 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-21 13:38:57,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 13:38:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-21 13:38:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 13:38:57,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:38:57,796 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:38:57,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:38:58,000 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:38:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:38:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-21 13:38:58,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:38:58,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598629309] [2020-07-21 13:38:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:38:59,642 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:38:59,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:38:59,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:38:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:38:59,791 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 13:38:59,792 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 13:38:59,792 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:38:59,800 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:38:59,803 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:38:59,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:7 [2020-07-21 13:38:59,895 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:38:59,903 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:38:59,985 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 13:39:00,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:39:00,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598629309] [2020-07-21 13:39:00,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:39:00,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 13:39:00,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007079169] [2020-07-21 13:39:00,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:39:00,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:39:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:39:00,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:39:00,108 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-07-21 13:39:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:39:00,600 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-07-21 13:39:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:39:00,602 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-07-21 13:39:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:39:00,614 INFO L225 Difference]: With dead ends: 56 [2020-07-21 13:39:00,614 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 13:39:00,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:39:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 13:39:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-07-21 13:39:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:39:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 13:39:00,638 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-21 13:39:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:39:00,639 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 13:39:00,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:39:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 13:39:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 13:39:00,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:39:00,642 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:39:00,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:00,846 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:39:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:39:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-21 13:39:00,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:39:00,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939836912] [2020-07-21 13:39:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:01,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:39:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:39:01,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 13:39:01,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:39:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 13:39:01,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:39:01,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939836912] [2020-07-21 13:39:01,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:39:01,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 13:39:01,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081929842] [2020-07-21 13:39:01,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:39:01,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:39:01,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:39:01,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:39:01,705 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-21 13:39:01,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:39:01,898 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 13:39:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:39:01,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-21 13:39:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:39:01,901 INFO L225 Difference]: With dead ends: 54 [2020-07-21 13:39:01,902 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:39:01,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 13:39:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:39:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 13:39:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:39:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-21 13:39:01,914 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-21 13:39:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:39:01,915 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-21 13:39:01,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:39:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-21 13:39:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 13:39:01,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:39:01,918 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:39:02,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:02,128 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:39:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:39:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-21 13:39:02,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:39:02,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126223758] [2020-07-21 13:39:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:02,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:39:02,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:39:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-21 13:39:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:39:02,904 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 13:39:02,905 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:02,912 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:02,913 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:02,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 13:39:02,958 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 13:39:02,959 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 13:39:02,960 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:02,967 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:02,970 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:02,971 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2020-07-21 13:39:03,121 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 13:39:03,123 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:03,147 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:03,157 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 13:39:03,158 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:03,175 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:03,178 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:03,178 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:46 [2020-07-21 13:39:03,944 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 13:39:04,722 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 13:39:04,767 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:04,768 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2020-07-21 13:39:04,771 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:04,774 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:04,785 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:04,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:39:04,798 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2020-07-21 13:39:04,799 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:04,815 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:04,817 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:04,818 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2020-07-21 13:39:04,974 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:04,976 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:05,080 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:05,222 INFO L440 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.base|, |#memory_$Pointer$.offset|], 2=[|#memory_int|]} [2020-07-21 13:39:05,229 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2020-07-21 13:39:05,231 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,237 INFO L624 ElimStorePlain]: treesize reduction 30, result has 3.2 percent of original size [2020-07-21 13:39:05,238 INFO L512 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-07-21 13:39:05,238 INFO L512 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2020-07-21 13:39:05,238 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,239 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:1 [2020-07-21 13:39:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 13:39:05,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:39:05,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:05,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:05,908 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:05,919 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,922 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:05,922 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:26 [2020-07-21 13:39:06,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126223758] [2020-07-21 13:39:06,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:39:06,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-21 13:39:06,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742061699] [2020-07-21 13:39:06,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 13:39:06,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:39:06,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 13:39:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:39:06,077 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 16 states. [2020-07-21 13:39:07,266 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 13:39:10,127 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:39:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:39:11,260 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-07-21 13:39:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 13:39:11,261 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-07-21 13:39:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:39:11,264 INFO L225 Difference]: With dead ends: 59 [2020-07-21 13:39:11,264 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 13:39:11,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 13:39:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 13:39:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-07-21 13:39:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 13:39:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-21 13:39:11,283 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-21 13:39:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:39:11,284 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-21 13:39:11,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 13:39:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-21 13:39:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 13:39:11,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:39:11,286 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:39:11,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:11,494 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:39:11,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:39:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1841731081, now seen corresponding path program 1 times [2020-07-21 13:39:11,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:39:11,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581623096] [2020-07-21 13:39:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:11,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:39:11,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:39:11,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 13:39:12,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:39:12,066 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 13:39:12,066 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:12,075 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:12,076 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:12,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 13:39:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 13:39:12,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:39:12,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 13:39:12,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581623096] [2020-07-21 13:39:12,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:39:12,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-07-21 13:39:12,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305382141] [2020-07-21 13:39:12,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 13:39:12,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:39:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 13:39:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:39:12,657 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 18 states. [2020-07-21 13:39:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:39:13,539 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-21 13:39:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 13:39:13,540 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-21 13:39:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:39:13,542 INFO L225 Difference]: With dead ends: 60 [2020-07-21 13:39:13,543 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:39:13,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 13:39:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:39:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-21 13:39:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 13:39:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-21 13:39:13,555 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 50 [2020-07-21 13:39:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:39:13,556 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-21 13:39:13,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 13:39:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-21 13:39:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 13:39:13,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:39:13,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:39:13,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:13,762 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:39:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:39:13,763 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-21 13:39:13,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:39:13,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213324869] [2020-07-21 13:39:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:14,254 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:39:14,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:39:14,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 90 conjunts are in the unsatisfiable core [2020-07-21 13:39:14,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:39:14,283 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 13:39:14,283 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:14,289 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:14,290 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:14,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 13:39:14,342 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 13:39:14,343 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 13:39:14,343 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:14,357 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:14,358 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:14,359 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2020-07-21 13:39:14,481 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 13:39:14,482 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:14,514 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:14,527 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 13:39:14,528 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:14,546 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:14,548 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:14,549 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:55 [2020-07-21 13:39:15,878 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 13:39:16,780 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 13:39:16,819 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:16,820 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 69 [2020-07-21 13:39:16,823 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:16,825 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:16,896 INFO L624 ElimStorePlain]: treesize reduction 32, result has 68.9 percent of original size [2020-07-21 13:39:16,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:39:16,925 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2020-07-21 13:39:16,927 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:16,948 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:16,950 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:16,950 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:49 [2020-07-21 13:39:17,183 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:17,243 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:17,248 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:17,287 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:17,293 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:17,326 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:17,331 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:17,356 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:17,358 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:17,359 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-21 13:39:28,698 WARN L193 SmtUtils]: Spent 5.26 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 13:39:36,768 WARN L193 SmtUtils]: Spent 5.99 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 13:39:36,825 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:36,826 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-07-21 13:39:36,828 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 13:39:36,829 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:36,830 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:36,865 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:36,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:39:36,882 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2020-07-21 13:39:36,884 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:36,950 INFO L624 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2020-07-21 13:39:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:39:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:39:36,965 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2020-07-21 13:39:36,966 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:37,008 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:39:37,022 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2020-07-21 13:39:37,024 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:37,061 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:37,064 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:37,065 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:100, output treesize:74 [2020-07-21 13:39:37,431 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:37,434 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:37,589 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:39:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:39:37,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:39:38,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:38,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:38,503 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 13:39:38,607 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 13:39:38,819 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 13:39:39,007 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 13:39:39,047 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.offset_92|, |v_#memory_$Pointer$.base_98|], 2=[|v_#memory_int_90|], 3=[|v_#memory_$Pointer$.offset_91|, |v_#memory_$Pointer$.base_97|]} [2020-07-21 13:39:39,061 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:39,133 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:39,142 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:39,201 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:39,208 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:39,240 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:39,245 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:39,264 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:39,268 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:39,279 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:39,282 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:39,283 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:124, output treesize:58 [2020-07-21 13:39:39,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213324869] [2020-07-21 13:39:39,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:39:39,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-21 13:39:39,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972822451] [2020-07-21 13:39:39,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:39:39,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:39:39,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:39:39,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=672, Unknown=4, NotChecked=0, Total=756 [2020-07-21 13:39:39,464 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 21 states. [2020-07-21 13:39:55,465 WARN L193 SmtUtils]: Spent 11.61 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-07-21 13:40:07,906 WARN L193 SmtUtils]: Spent 12.18 s on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-07-21 13:40:20,107 WARN L193 SmtUtils]: Spent 12.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-07-21 13:40:29,102 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-07-21 13:40:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:32,703 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-07-21 13:40:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 13:40:32,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-07-21 13:40:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:32,707 INFO L225 Difference]: With dead ends: 64 [2020-07-21 13:40:32,707 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 13:40:32,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=199, Invalid=1516, Unknown=7, NotChecked=0, Total=1722 [2020-07-21 13:40:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 13:40:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-07-21 13:40:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 13:40:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-07-21 13:40:32,724 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-07-21 13:40:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:32,725 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-07-21 13:40:32,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:40:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-07-21 13:40:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 13:40:32,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:32,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:40:32,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:32,943 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:32,944 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 2 times [2020-07-21 13:40:32,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:32,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511189162] [2020-07-21 13:40:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:34,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:40:34,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:34,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 54 conjunts are in the unsatisfiable core [2020-07-21 13:40:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:34,266 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 13:40:34,267 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:34,275 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:34,276 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:40:34,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 13:40:34,303 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:40:34,331 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 13:40:34,333 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:34,344 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 13:40:34,345 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:34,374 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:34,376 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 13:40:34,377 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2020-07-21 13:40:34,535 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_94|], 2=[|v_#memory_$Pointer$.base_101|, |v_#memory_$Pointer$.base_103|]} [2020-07-21 13:40:34,545 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 13:40:34,546 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:34,581 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:34,585 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:40:34,616 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:34,622 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:34,637 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:34,639 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:40:34,640 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:62, output treesize:31 [2020-07-21 13:40:36,217 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 13:40:37,473 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 13:40:37,503 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:37,504 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 13:40:37,506 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:40:37,507 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:37,517 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:37,536 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-21 13:40:37,538 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 33 treesize of output 36 [2020-07-21 13:40:37,539 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:37,550 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:37,552 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:40:37,553 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:33 [2020-07-21 13:40:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:40:37,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:40:38,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:40:38,419 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_116|], 3=[|v_#memory_$Pointer$.base_115|]} [2020-07-21 13:40:38,424 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:38,443 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:38,448 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:40:38,462 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:38,465 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 13:40:38,465 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:58, output treesize:29 [2020-07-21 13:40:38,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511189162] [2020-07-21 13:40:38,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:40:38,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 13:40:38,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985059893] [2020-07-21 13:40:38,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 13:40:38,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:38,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 13:40:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:40:38,561 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 18 states. [2020-07-21 13:40:40,295 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 13:40:43,261 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-07-21 13:40:47,073 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 13:40:54,738 WARN L193 SmtUtils]: Spent 7.61 s on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-07-21 13:40:56,084 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:40:57,472 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 13:41:01,266 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-07-21 13:41:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:41:02,398 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-07-21 13:41:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 13:41:02,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-21 13:41:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:41:02,402 INFO L225 Difference]: With dead ends: 70 [2020-07-21 13:41:02,403 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 13:41:02,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 13:41:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 13:41:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-07-21 13:41:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 13:41:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-21 13:41:02,417 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2020-07-21 13:41:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:41:02,418 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-21 13:41:02,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 13:41:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-21 13:41:02,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 13:41:02,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:41:02,421 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:41:02,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:41:02,625 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:41:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:41:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-21 13:41:02,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:41:02,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210196323] [2020-07-21 13:41:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:41:04,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:41:04,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:41:04,051 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:41:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:41:04,879 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:41:04,975 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:41:04,976 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:41:05,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:41:05,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:41:05 BoogieIcfgContainer [2020-07-21 13:41:05,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:41:05,288 INFO L168 Benchmark]: Toolchain (without parser) took 131317.56 ms. Allocated memory was 143.7 MB in the beginning and 356.5 MB in the end (delta: 212.9 MB). Free memory was 100.4 MB in the beginning and 226.7 MB in the end (delta: -126.3 MB). Peak memory consumption was 86.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:41:05,289 INFO L168 Benchmark]: CDTParser took 1.18 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 13:41:05,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1010.75 ms. Allocated memory was 143.7 MB in the beginning and 202.9 MB in the end (delta: 59.2 MB). Free memory was 100.0 MB in the beginning and 169.4 MB in the end (delta: -69.4 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:41:05,290 INFO L168 Benchmark]: Boogie Preprocessor took 96.70 ms. Allocated memory is still 202.9 MB. Free memory was 169.4 MB in the beginning and 166.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:41:05,290 INFO L168 Benchmark]: RCFGBuilder took 955.19 ms. Allocated memory is still 202.9 MB. Free memory was 166.6 MB in the beginning and 121.8 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:41:05,291 INFO L168 Benchmark]: TraceAbstraction took 129242.49 ms. Allocated memory was 202.9 MB in the beginning and 356.5 MB in the end (delta: 153.6 MB). Free memory was 121.1 MB in the beginning and 226.7 MB in the end (delta: -105.6 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:41:05,294 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1010.75 ms. Allocated memory was 143.7 MB in the beginning and 202.9 MB in the end (delta: 59.2 MB). Free memory was 100.0 MB in the beginning and 169.4 MB in the end (delta: -69.4 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.70 ms. Allocated memory is still 202.9 MB. Free memory was 169.4 MB in the beginning and 166.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 955.19 ms. Allocated memory is still 202.9 MB. Free memory was 166.6 MB in the beginning and 121.8 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 129242.49 ms. Allocated memory was 202.9 MB in the beginning and 356.5 MB in the end (delta: 153.6 MB). Free memory was 121.1 MB in the beginning and 226.7 MB in the end (delta: -105.6 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L522] mlist *head; VAL [\old(head)=10, \old(head)=6, head={0:0}] [L543] int i; [L544] mlist *mylist, *temp; VAL [\old(head)=0, \old(head)=0, head={0:0}] [L545] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={12:11}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={12:11}, l={7109:0}, malloc(sizeof(mlist))={7109:0}] [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={12:11}, l={7109:0}, malloc(sizeof(mlist))={7109:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={7109:0}, k=2, l={7109:0}, l={12:11}, malloc(sizeof(mlist))={7109:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={7109:0}, insert_list(mylist,2)=0, mylist={12:11}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=7109, \old(head)=0, \old(k)=5, head={7109:0}, l={12:11}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=7109, \old(head)=0, \old(k)=5, head={7109:0}, k=5, l={12:11}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=7109, \old(k)=5, head={7109:0}, k=5, l={-1:0}, l={12:11}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=7109, \old(head)=0, \old(k)=5, \result=0, head={-1:0}, k=5, l={12:11}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,5)=0, mylist={12:11}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=-1, \old(k)=1, head={-1:0}, l={12:11}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=-1, \old(head)=0, \old(k)=1, head={-1:0}, k=1, l={6389:0}, l={12:11}, malloc(sizeof(mlist))={6389:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-1, \old(k)=1, head={-1:0}, k=1, l={12:11}, l={6389:0}, malloc(sizeof(mlist))={6389:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-1, \old(k)=1, \result=0, head={6389:0}, k=1, l={6389:0}, l={12:11}, malloc(sizeof(mlist))={6389:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={6389:0}, insert_list(mylist,1)=0, mylist={12:11}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=6389, \old(head)=0, \old(k)=3, head={6389:0}, l={12:11}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=6389, \old(head)=0, \old(k)=3, head={6389:0}, k=3, l={7110:0}, l={12:11}, malloc(sizeof(mlist))={7110:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=6389, \old(k)=3, head={6389:0}, k=3, l={12:11}, l={7110:0}, malloc(sizeof(mlist))={7110:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=6389, \old(k)=3, \result=0, head={7110:0}, k=3, l={7110:0}, l={12:11}, malloc(sizeof(mlist))={7110:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={7110:0}, insert_list(mylist,3)=0, mylist={12:11}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={7110:0}, l={7110:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={7110:0}, k=2, l={7110:0}, l={7110:0}] [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={7110:0}, k=2, l={7110:0}, l={7110:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={7110:0}, k=2, l={7110:0}, l={6389:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={7110:0}, k=2, l={-1:0}, l={7110:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={7110:0}, k=2, l={7110:0}, l={7109:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L525] COND FALSE !(l!=((void *)0) && l->key!=k) [L528] return l; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result={7109:0}, head={7110:0}, k=2, l={7110:0}, l={7109:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={7110:0}, mylist={12:11}, search_list(head,2)={7109:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={7110:0}, mylist={12:11}, temp={7109:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={7110:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={7110:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={7110:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 129.0s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 84.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 197 SDtfs, 438 SDslu, 659 SDs, 0 SdLazy, 1911 SolverSat, 290 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 11.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 575 GetRequests, 398 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 100.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 6.2s SatisfiabilityAnalysisTime, 34.3s InterpolantComputationTime, 401 NumberOfCodeBlocks, 379 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 431 ConstructedInterpolants, 12 QuantifiedInterpolants, 230268 SizeOfPredicates, 85 NumberOfNonLiveVariables, 2281 ConjunctsInSsa, 254 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 230/297 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...