/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:07:49,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:07:49,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:07:49,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:07:49,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:07:49,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:07:49,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:07:49,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:07:49,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:07:49,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:07:49,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:07:49,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:07:49,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:07:49,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:07:49,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:07:49,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:07:49,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:07:49,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:07:49,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:07:49,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:07:49,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:07:49,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:07:49,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:07:49,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:07:49,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:07:49,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:07:49,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:07:49,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:07:49,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:07:49,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:07:49,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:07:49,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:07:49,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:07:49,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:07:49,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:07:49,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:07:49,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:07:49,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:07:49,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:07:49,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:07:49,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:07:49,900 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 01:07:49,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:07:49,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:07:49,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:07:49,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:07:49,945 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:07:49,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:07:49,945 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:07:49,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:07:49,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:07:49,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:07:49,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:07:49,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:07:49,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:07:49,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:07:49,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:07:49,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:07:49,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:07:49,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:07:49,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:07:49,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:07:49,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:07:49,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:07:49,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:07:49,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:07:49,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:07:49,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:07:49,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:49,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:07:49,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:07:49,952 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:07:50,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:07:50,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:07:50,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:07:50,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:07:50,305 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:07:50,306 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 01:07:50,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d4ef532d/a1bf39aae7f24388888214361dfc0c2f/FLAG76909b695 [2020-07-21 01:07:51,171 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:07:51,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 01:07:51,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d4ef532d/a1bf39aae7f24388888214361dfc0c2f/FLAG76909b695 [2020-07-21 01:07:51,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d4ef532d/a1bf39aae7f24388888214361dfc0c2f [2020-07-21 01:07:51,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:07:51,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:07:51,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:07:51,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:07:51,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:07:51,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:07:51" (1/1) ... [2020-07-21 01:07:51,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d43a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:51, skipping insertion in model container [2020-07-21 01:07:51,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:07:51" (1/1) ... [2020-07-21 01:07:51,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:07:51,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:07:51,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:07:52,008 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:07:52,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:07:52,169 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:07:52,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52 WrapperNode [2020-07-21 01:07:52,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:07:52,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:07:52,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:07:52,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:07:52,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (1/1) ... [2020-07-21 01:07:52,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (1/1) ... [2020-07-21 01:07:52,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (1/1) ... [2020-07-21 01:07:52,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (1/1) ... [2020-07-21 01:07:52,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (1/1) ... [2020-07-21 01:07:52,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (1/1) ... [2020-07-21 01:07:52,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (1/1) ... [2020-07-21 01:07:52,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:07:52,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:07:52,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:07:52,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:07:52,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (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 01:07:52,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:07:52,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:07:52,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:07:52,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 01:07:52,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 01:07:52,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 01:07:52,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 01:07:52,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 01:07:52,361 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-21 01:07:52,362 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-21 01:07:52,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:07:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 01:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 01:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 01:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 01:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 01:07:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 01:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 01:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 01:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 01:07:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 01:07:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 01:07:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 01:07:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 01:07:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 01:07:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 01:07:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 01:07:52,369 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 01:07:52,369 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 01:07:52,369 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 01:07:52,369 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 01:07:52,369 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 01:07:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 01:07:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 01:07:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 01:07:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 01:07:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 01:07:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 01:07:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 01:07:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 01:07:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 01:07:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 01:07:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 01:07:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 01:07:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 01:07:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 01:07:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 01:07:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 01:07:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 01:07:52,372 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 01:07:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 01:07:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 01:07:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 01:07:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 01:07:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 01:07:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 01:07:52,374 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 01:07:52,374 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 01:07:52,374 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 01:07:52,374 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 01:07:52,374 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 01:07:52,374 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 01:07:52,375 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 01:07:52,375 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 01:07:52,375 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 01:07:52,375 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 01:07:52,375 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:07:52,375 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 01:07:52,375 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 01:07:52,376 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 01:07:52,376 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 01:07:52,376 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 01:07:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 01:07:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 01:07:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:07:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 01:07:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 01:07:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 01:07:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:07:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 01:07:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 01:07:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 01:07:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 01:07:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 01:07:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 01:07:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 01:07:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 01:07:52,382 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 01:07:52,382 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 01:07:52,382 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 01:07:52,382 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 01:07:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 01:07:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 01:07:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 01:07:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 01:07:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 01:07:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 01:07:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 01:07:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 01:07:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 01:07:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 01:07:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 01:07:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 01:07:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 01:07:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 01:07:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 01:07:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 01:07:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 01:07:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 01:07:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 01:07:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 01:07:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 01:07:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 01:07:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 01:07:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 01:07:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 01:07:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 01:07:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 01:07:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-21 01:07:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:07:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 01:07:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-21 01:07:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:07:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:07:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 01:07:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:07:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:07:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:07:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:07:53,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:07:53,051 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 01:07:53,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:07:53 BoogieIcfgContainer [2020-07-21 01:07:53,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:07:53,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:07:53,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:07:53,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:07:53,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:07:51" (1/3) ... [2020-07-21 01:07:53,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@803e1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:07:53, skipping insertion in model container [2020-07-21 01:07:53,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:52" (2/3) ... [2020-07-21 01:07:53,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@803e1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:07:53, skipping insertion in model container [2020-07-21 01:07:53,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:07:53" (3/3) ... [2020-07-21 01:07:53,070 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-21 01:07:53,085 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:07:53,097 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:07:53,116 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:07:53,142 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:07:53,142 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:07:53,142 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:07:53,142 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:07:53,142 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:07:53,142 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:07:53,143 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:07:53,143 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:07:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-21 01:07:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 01:07:53,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:53,171 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 01:07:53,171 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-21 01:07:53,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:53,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126497430] [2020-07-21 01:07:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:53,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:07:53,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:53,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:07:53,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 01:07:53,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:07:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 01:07:53,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126497430] [2020-07-21 01:07:53,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:07:53,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-21 01:07:53,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906614346] [2020-07-21 01:07:53,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:07:53,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:53,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:07:53,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:07:53,786 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-07-21 01:07:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:07:54,234 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-07-21 01:07:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:07:54,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-07-21 01:07:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:07:54,251 INFO L225 Difference]: With dead ends: 95 [2020-07-21 01:07:54,252 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 01:07:54,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-21 01:07:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 01:07:54,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-21 01:07:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 01:07:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-21 01:07:54,330 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-07-21 01:07:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:07:54,330 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-21 01:07:54,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:07:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-21 01:07:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 01:07:54,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:54,343 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 01:07:54,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:54,548 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:54,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-21 01:07:54,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:54,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167024203] [2020-07-21 01:07:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:55,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:07:55,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:55,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 01:07:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:07:55,469 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 01:07:55,470 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:55,485 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:55,488 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 01:07:55,490 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:11 [2020-07-21 01:07:55,586 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:07:55,596 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:07:55,670 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:07:55,738 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 01:07:55,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:07:55,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167024203] [2020-07-21 01:07:55,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:07:55,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 01:07:55,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955240504] [2020-07-21 01:07:55,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:07:55,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:07:55,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:07:55,747 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-07-21 01:07:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:07:56,137 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-07-21 01:07:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:07:56,138 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-07-21 01:07:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:07:56,142 INFO L225 Difference]: With dead ends: 57 [2020-07-21 01:07:56,143 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 01:07:56,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:07:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 01:07:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-21 01:07:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 01:07:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 01:07:56,165 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-21 01:07:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:07:56,166 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 01:07:56,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:07:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 01:07:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 01:07:56,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:56,171 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 01:07:56,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:56,390 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-21 01:07:56,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:56,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37986369] [2020-07-21 01:07:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:57,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:07:57,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:07:57,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:57,129 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 01:07:57,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:07:57,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37986369] [2020-07-21 01:07:57,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:07:57,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:07:57,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021276349] [2020-07-21 01:07:57,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:07:57,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:57,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:07:57,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:07:57,133 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-21 01:07:57,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:07:57,264 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 01:07:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:07:57,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-21 01:07:57,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:07:57,266 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:07:57,266 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 01:07:57,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:07:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 01:07:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 01:07:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 01:07:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-21 01:07:57,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-21 01:07:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:07:57,277 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-21 01:07:57,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:07:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-21 01:07:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 01:07:57,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:57,279 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 01:07:57,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:57,493 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-21 01:07:57,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:57,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058915361] [2020-07-21 01:07:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:58,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:07:58,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:58,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-21 01:07:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:58,222 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 01:07:58,222 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:58,228 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:58,230 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:07:58,230 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 01:07:58,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:07:58,257 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 01:07:58,258 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:58,274 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:58,275 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 01:07:58,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-21 01:07:58,433 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-21 01:07:58,436 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:58,459 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:58,467 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 01:07:58,468 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:58,488 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:58,490 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 01:07:58,491 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:49 [2020-07-21 01:07:59,294 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 01:08:00,003 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 01:08:00,032 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:00,033 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 01:08:00,034 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:00,048 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:00,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:00,063 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2020-07-21 01:08:00,064 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:00,086 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:00,087 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 01:08:00,088 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:36 [2020-07-21 01:08:00,229 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:08:00,230 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:08:00,302 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:08:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:08:00,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:08:00,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:08:00,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:08:00,920 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 01:08:00,927 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:00,930 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 01:08:00,931 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:25 [2020-07-21 01:08:00,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058915361] [2020-07-21 01:08:00,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:08:00,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-21 01:08:00,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712872518] [2020-07-21 01:08:00,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 01:08:00,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:08:00,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 01:08:00,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-07-21 01:08:00,992 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 17 states. [2020-07-21 01:08:02,062 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 01:08:04,143 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 01:08:06,499 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 01:08:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:08:07,171 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-07-21 01:08:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 01:08:07,173 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-07-21 01:08:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:08:07,179 INFO L225 Difference]: With dead ends: 60 [2020-07-21 01:08:07,180 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 01:08:07,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 01:08:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 01:08:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-07-21 01:08:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 01:08:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-21 01:08:07,203 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-21 01:08:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:08:07,203 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-21 01:08:07,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 01:08:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-21 01:08:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 01:08:07,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:08:07,209 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 01:08:07,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:08:07,417 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:08:07,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:08:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1841731081, now seen corresponding path program 1 times [2020-07-21 01:08:07,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:08:07,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334240908] [2020-07-21 01:08:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:08:08,096 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:08:08,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:08:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 01:08:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:08:08,135 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:08:08,157 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 01:08:08,157 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:08,165 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 01:08:08,166 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:08,190 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:08,191 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 01:08:08,193 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2020-07-21 01:08:08,317 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 01:08:08,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:08:08,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:08:08,618 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 01:08:08,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334240908] [2020-07-21 01:08:08,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:08:08,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2020-07-21 01:08:08,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871849455] [2020-07-21 01:08:08,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 01:08:08,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:08:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 01:08:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-07-21 01:08:08,622 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 16 states. [2020-07-21 01:08:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:08:09,267 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-21 01:08:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:08:09,268 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-07-21 01:08:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:08:09,272 INFO L225 Difference]: With dead ends: 61 [2020-07-21 01:08:09,272 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 01:08:09,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-07-21 01:08:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 01:08:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-07-21 01:08:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 01:08:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-07-21 01:08:09,296 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 50 [2020-07-21 01:08:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:08:09,297 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-07-21 01:08:09,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 01:08:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-07-21 01:08:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 01:08:09,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:08:09,303 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 01:08:09,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:08:09,504 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:08:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:08:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-21 01:08:09,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:08:09,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428777639] [2020-07-21 01:08:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:08:09,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:08:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:08:09,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 101 conjunts are in the unsatisfiable core [2020-07-21 01:08:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:08:09,920 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 01:08:09,921 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:09,927 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:09,928 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:08:09,929 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 01:08:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:09,946 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 01:08:09,947 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:09,955 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:09,956 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 01:08:09,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-21 01:08:10,067 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 01:08:10,068 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:10,085 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:10,092 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 01:08:10,092 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:10,111 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:10,112 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 01:08:10,113 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2020-07-21 01:08:10,909 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 01:08:11,722 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 01:08:11,761 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:11,761 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 52 [2020-07-21 01:08:11,763 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:11,815 INFO L624 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2020-07-21 01:08:11,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:11,846 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:11,847 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 58 [2020-07-21 01:08:11,848 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:08:11,850 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:11,904 INFO L624 ElimStorePlain]: treesize reduction 24, result has 72.1 percent of original size [2020-07-21 01:08:11,907 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 01:08:11,907 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:68, output treesize:59 [2020-07-21 01:08:12,068 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:12,112 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:12,117 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 01:08:12,150 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:12,154 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 01:08:12,181 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:12,186 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:12,204 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:12,205 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 01:08:12,205 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-21 01:08:20,267 WARN L193 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 01:08:25,162 WARN L193 SmtUtils]: Spent 4.82 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 01:08:25,174 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:08:25,176 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:08:25,179 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:08:25,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,227 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:25,227 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 01:08:25,228 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:25,247 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:25,248 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 19 [2020-07-21 01:08:25,249 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:25,337 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:25,339 INFO L440 ElimStorePlain]: Different costs {4=[|v_old(#memory_$Pointer$.base)_AFTER_CALL_26|, |v_#memory_$Pointer$.offset_BEFORE_CALL_2|], 9=[|v_old(#memory_int)_AFTER_CALL_26|]} [2020-07-21 01:08:25,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,366 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2020-07-21 01:08:25,368 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:25,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,385 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 01:08:25,404 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:25,405 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 47 [2020-07-21 01:08:25,408 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:25,636 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-07-21 01:08:25,637 INFO L624 ElimStorePlain]: treesize reduction 20, result has 89.7 percent of original size [2020-07-21 01:08:25,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,669 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2020-07-21 01:08:25,670 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:25,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,693 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2020-07-21 01:08:25,694 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:25,802 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 01:08:25,803 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:25,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,845 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:25,846 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 44 [2020-07-21 01:08:25,847 INFO L544 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:08:25,861 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2020-07-21 01:08:25,863 INFO L544 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:25,998 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-07-21 01:08:26,000 INFO L624 ElimStorePlain]: treesize reduction 24, result has 85.8 percent of original size [2020-07-21 01:08:26,002 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 01:08:26,003 INFO L244 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:201, output treesize:139 [2020-07-21 01:08:26,605 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:08:26,745 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-07-21 01:08:26,746 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:08:26,796 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 01:08:26,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:08:27,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:08:27,444 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 01:08:27,677 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 01:08:27,822 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 01:08:27,870 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_100|, |v_#memory_$Pointer$.offset_93|], 2=[|v_#memory_int_92|], 3=[|v_#memory_$Pointer$.offset_94|, |v_#memory_$Pointer$.base_99|]} [2020-07-21 01:08:27,877 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:27,927 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:27,932 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:08:27,956 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:27,960 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 01:08:27,983 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:27,987 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 01:08:28,004 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:28,007 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 01:08:28,017 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:08:28,018 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 01:08:28,018 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:126, output treesize:60 [2020-07-21 01:08:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428777639] [2020-07-21 01:08:28,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:08:28,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-21 01:08:28,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554605489] [2020-07-21 01:08:28,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 01:08:28,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:08:28,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 01:08:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=674, Unknown=1, NotChecked=0, Total=756 [2020-07-21 01:08:28,141 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 21 states. [2020-07-21 01:08:42,630 WARN L193 SmtUtils]: Spent 10.14 s on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-07-21 01:08:54,175 WARN L193 SmtUtils]: Spent 11.30 s on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2020-07-21 01:09:10,397 WARN L193 SmtUtils]: Spent 11.65 s on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-07-21 01:09:14,080 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-07-21 01:09:26,532 WARN L193 SmtUtils]: Spent 12.21 s on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-07-21 01:09:27,447 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 01:09:27,687 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 01:09:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:09:28,258 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-07-21 01:09:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 01:09:28,260 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-07-21 01:09:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:09:28,262 INFO L225 Difference]: With dead ends: 66 [2020-07-21 01:09:28,263 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 01:09:28,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 69.2s TimeCoverageRelationStatistics Valid=213, Invalid=1589, Unknown=4, NotChecked=0, Total=1806 [2020-07-21 01:09:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 01:09:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2020-07-21 01:09:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 01:09:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-07-21 01:09:28,278 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 53 [2020-07-21 01:09:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:09:28,279 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-07-21 01:09:28,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 01:09:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-07-21 01:09:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 01:09:28,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:09:28,281 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 01:09:28,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:09:28,496 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:09:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:09:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 2 times [2020-07-21 01:09:28,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:09:28,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091545559] [2020-07-21 01:09:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:09:28,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:09:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:09:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 01:09:28,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:09:28,938 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 01:09:28,938 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:09:28,945 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:28,945 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:09:28,946 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 01:09:28,962 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 01:09:28,963 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:09:28,970 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:28,971 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:09:28,972 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-07-21 01:09:29,101 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_96|], 2=[|v_#memory_$Pointer$.base_105|, |v_#memory_$Pointer$.base_103|]} [2020-07-21 01:09:29,107 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 01:09:29,108 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:09:29,124 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:29,128 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:09:29,143 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:29,149 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 01:09:29,156 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:29,157 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 01:09:29,157 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:62, output treesize:31 [2020-07-21 01:09:30,789 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 01:09:31,972 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 01:09:31,986 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:31,986 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 01:09:31,987 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:09:31,995 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:09:32,001 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2020-07-21 01:09:32,001 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:09:32,010 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:32,011 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 01:09:32,011 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:34 [2020-07-21 01:09:32,206 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 01:09:32,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:09:32,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:09:32,598 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_117|], 3=[|v_#memory_$Pointer$.base_118|]} [2020-07-21 01:09:32,600 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:09:32,608 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:32,611 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 01:09:32,615 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:09:32,616 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 01:09:32,616 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2020-07-21 01:09:32,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091545559] [2020-07-21 01:09:32,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:09:32,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 01:09:32,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919587249] [2020-07-21 01:09:32,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 01:09:32,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:09:32,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 01:09:32,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-07-21 01:09:32,671 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 18 states. [2020-07-21 01:09:35,322 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-07-21 01:09:41,615 WARN L193 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-07-21 01:09:44,543 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-07-21 01:09:47,110 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-07-21 01:09:53,710 WARN L193 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-07-21 01:09:58,067 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-07-21 01:09:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:09:59,140 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-07-21 01:09:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 01:09:59,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-21 01:09:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:09:59,143 INFO L225 Difference]: With dead ends: 67 [2020-07-21 01:09:59,143 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 01:09:59,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=317, Invalid=1753, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 01:09:59,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 01:09:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-07-21 01:09:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 01:09:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-21 01:09:59,154 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2020-07-21 01:09:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:09:59,155 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-21 01:09:59,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 01:09:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-21 01:09:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 01:09:59,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:09:59,156 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 01:09:59,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:09:59,362 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:09:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:09:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-21 01:09:59,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:09:59,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733609590] [2020-07-21 01:09:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:00,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:10:00,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:10:00,319 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:10:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:10:00,475 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:10:00,598 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:10:00,599 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:10:00,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:00,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:10:00 BoogieIcfgContainer [2020-07-21 01:10:00,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:10:00,894 INFO L168 Benchmark]: Toolchain (without parser) took 129590.06 ms. Allocated memory was 144.2 MB in the beginning and 336.1 MB in the end (delta: 191.9 MB). Free memory was 99.8 MB in the beginning and 92.1 MB in the end (delta: 7.7 MB). Peak memory consumption was 199.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:10:00,894 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 01:10:00,895 INFO L168 Benchmark]: CACSL2BoogieTranslator took 863.47 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 99.4 MB in the beginning and 170.3 MB in the end (delta: -71.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:10:00,895 INFO L168 Benchmark]: Boogie Preprocessor took 102.89 ms. Allocated memory is still 203.9 MB. Free memory was 170.3 MB in the beginning and 167.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:10:00,895 INFO L168 Benchmark]: RCFGBuilder took 782.20 ms. Allocated memory is still 203.9 MB. Free memory was 167.6 MB in the beginning and 122.6 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:10:00,896 INFO L168 Benchmark]: TraceAbstraction took 127831.28 ms. Allocated memory was 203.9 MB in the beginning and 336.1 MB in the end (delta: 132.1 MB). Free memory was 121.9 MB in the beginning and 92.1 MB in the end (delta: 29.8 MB). Peak memory consumption was 162.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:10:00,898 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 863.47 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 99.4 MB in the beginning and 170.3 MB in the end (delta: -71.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.89 ms. Allocated memory is still 203.9 MB. Free memory was 170.3 MB in the beginning and 167.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 782.20 ms. Allocated memory is still 203.9 MB. Free memory was 167.6 MB in the beginning and 122.6 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 127831.28 ms. Allocated memory was 203.9 MB in the beginning and 336.1 MB in the end (delta: 132.1 MB). Free memory was 121.9 MB in the beginning and 92.1 MB in the end (delta: 29.8 MB). Peak memory consumption was 162.0 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)=9, head={0:0}] [L543] int i; [L544] mlist *mylist, *temp; VAL [\old(head)=0, \old(head)=0, head={0:0}] [L545] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={1734:0}, l={11:12}, malloc(sizeof(mlist))={1734:0}] [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={11:12}, l={1734:0}, malloc(sizeof(mlist))={1734:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={1734:0}, k=2, l={11:12}, l={1734:0}, malloc(sizeof(mlist))={1734:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={1734:0}, insert_list(mylist,2)=0, mylist={11:12}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=1734, \old(head)=0, \old(k)=5, head={1734:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=1734, \old(head)=0, \old(k)=5, head={1734:0}, k=5, l={11:12}, l={1735:0}, malloc(sizeof(mlist))={1735:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=1734, \old(k)=5, head={1734:0}, k=5, l={1735:0}, l={11:12}, malloc(sizeof(mlist))={1735:0}] [L539] head = l [L540] return 0; VAL [\old(head)=1734, \old(head)=0, \old(k)=5, \result=0, head={1735:0}, k=5, l={1735:0}, l={11:12}, malloc(sizeof(mlist))={1735:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={1735:0}, insert_list(mylist,5)=0, mylist={11:12}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=1735, \old(head)=0, \old(k)=1, head={1735:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=1735, \old(k)=1, head={1735:0}, k=1, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=1735, \old(head)=0, \old(k)=1, head={1735:0}, k=1, l={11:12}, l={-2:0}, malloc(sizeof(mlist))={-2:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=1735, \old(k)=1, \result=0, head={-2:0}, k=1, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={-2:0}, insert_list(mylist,1)=0, mylist={11:12}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=0, \old(head)=-2, \old(k)=3, head={-2:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=-2, \old(head)=0, \old(k)=3, head={-2:0}, k=3, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=-2, \old(head)=0, \old(k)=3, head={-2:0}, k=3, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-2, \old(k)=3, \result=0, head={-1:0}, k=3, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,3)=0, mylist={11:12}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-1:0}, l={-1:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-1:0}, k=2, l={-1:0}, l={-1:0}] [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={-1:0}, k=2, l={-1:0}, l={-1:0}, 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={-1:0}, k=2, l={-1:0}, l={-2:0}, 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={-1:0}, k=2, l={-1:0}, l={1735:0}, 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={-1:0}, k=2, l={-1:0}, l={1734:0}, 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={1734:0}, head={-1:0}, k=2, l={1734:0}, l={-1:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={-1:0}, mylist={11:12}, search_list(head,2)={1734:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={-1:0}, mylist={11:12}, temp={1734:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={-1:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-1:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 127.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 94.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 194 SDtfs, 466 SDslu, 658 SDs, 0 SdLazy, 1929 SolverSat, 313 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 8.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 572 GetRequests, 398 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 106.7s 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, 49 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 26.0s InterpolantComputationTime, 401 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 431 ConstructedInterpolants, 12 QuantifiedInterpolants, 294555 SizeOfPredicates, 100 NumberOfNonLiveVariables, 2256 ConjunctsInSsa, 297 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 208/297 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...