/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:11:01,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:11:01,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:11:01,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:11:01,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:11:01,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:11:01,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:11:01,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:11:01,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:11:01,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:11:01,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:11:01,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:11:01,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:11:01,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:11:01,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:11:01,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:11:01,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:11:01,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:11:01,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:11:01,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:11:01,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:11:01,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:11:01,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:11:01,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:11:01,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:11:01,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:11:01,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:11:01,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:11:01,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:11:01,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:11:01,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:11:01,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:11:01,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:11:01,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:11:01,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:11:01,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:11:01,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:11:01,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:11:01,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:11:01,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:11:01,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:11:01,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:11:02,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:11:02,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:11:02,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:11:02,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:11:02,025 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:11:02,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:11:02,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:11:02,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:11:02,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:11:02,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:11:02,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:11:02,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:11:02,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:11:02,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:11:02,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:11:02,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:11:02,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:11:02,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:11:02,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:11:02,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:11:02,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:11:02,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:11:02,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:11:02,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:11:02,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:11:02,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:11:02,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:11:02,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:11:02,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:11:02,032 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:11:02,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:11:02,521 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:11:02,526 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:11:02,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:11:02,528 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:11:02,530 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-25 11:11:02,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e22733717/955a16f289bb4ae685e7dcab39516b5e/FLAG34ed70774 [2020-09-25 11:11:03,237 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:11:03,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-25 11:11:03,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e22733717/955a16f289bb4ae685e7dcab39516b5e/FLAG34ed70774 [2020-09-25 11:11:03,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e22733717/955a16f289bb4ae685e7dcab39516b5e [2020-09-25 11:11:03,540 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:11:03,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:11:03,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:11:03,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:11:03,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:11:03,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ac6c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03, skipping insertion in model container [2020-09-25 11:11:03,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:11:03,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:11:04,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:11:04,086 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:11:04,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:11:04,200 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:11:04,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04 WrapperNode [2020-09-25 11:11:04,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:11:04,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:11:04,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:11:04,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:11:04,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (1/1) ... [2020-09-25 11:11:04,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (1/1) ... [2020-09-25 11:11:04,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (1/1) ... [2020-09-25 11:11:04,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (1/1) ... [2020-09-25 11:11:04,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (1/1) ... [2020-09-25 11:11:04,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (1/1) ... [2020-09-25 11:11:04,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (1/1) ... [2020-09-25 11:11:04,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:11:04,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:11:04,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:11:04,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:11:04,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-25 11:11:04,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:11:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:11:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 11:11:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 11:11:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-25 11:11:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-25 11:11:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-25 11:11:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 11:11:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:11:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:11:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:11:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 11:11:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 11:11:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 11:11:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 11:11:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 11:11:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 11:11:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 11:11:04,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 11:11:04,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 11:11:04,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 11:11:04,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 11:11:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 11:11:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 11:11:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 11:11:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 11:11:04,403 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 11:11:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 11:11:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 11:11:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-25 11:11:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-25 11:11:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-25 11:11:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 11:11:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 11:11:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 11:11:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 11:11:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 11:11:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 11:11:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 11:11:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 11:11:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 11:11:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 11:11:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 11:11:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 11:11:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 11:11:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 11:11:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 11:11:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 11:11:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 11:11:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 11:11:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 11:11:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 11:11:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 11:11:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 11:11:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 11:11:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 11:11:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 11:11:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 11:11:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 11:11:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 11:11:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 11:11:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 11:11:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 11:11:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 11:11:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 11:11:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 11:11:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 11:11:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 11:11:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 11:11:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 11:11:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 11:11:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 11:11:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 11:11:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 11:11:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:11:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 11:11:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 11:11:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 11:11:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:11:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 11:11:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 11:11:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 11:11:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 11:11:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 11:11:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 11:11:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 11:11:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 11:11:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 11:11:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 11:11:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 11:11:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 11:11:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 11:11:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 11:11:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 11:11:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 11:11:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 11:11:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 11:11:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 11:11:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 11:11:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 11:11:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 11:11:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 11:11:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 11:11:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 11:11:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 11:11:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 11:11:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 11:11:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 11:11:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 11:11:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 11:11:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 11:11:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 11:11:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 11:11:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 11:11:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 11:11:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 11:11:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 11:11:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 11:11:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 11:11:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:11:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 11:11:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 11:11:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 11:11:04,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 11:11:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 11:11:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 11:11:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:11:04,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:11:04,797 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 11:11:05,010 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:11:05,010 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 11:11:05,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:11:05 BoogieIcfgContainer [2020-09-25 11:11:05,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:11:05,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:11:05,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:11:05,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:11:05,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:11:03" (1/3) ... [2020-09-25 11:11:05,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22471bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:11:05, skipping insertion in model container [2020-09-25 11:11:05,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:04" (2/3) ... [2020-09-25 11:11:05,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22471bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:11:05, skipping insertion in model container [2020-09-25 11:11:05,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:11:05" (3/3) ... [2020-09-25 11:11:05,026 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-09-25 11:11:05,038 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:11:05,050 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:11:05,074 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:11:05,110 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:11:05,110 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:11:05,110 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:11:05,110 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:11:05,111 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:11:05,111 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:11:05,111 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:11:05,111 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:11:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-09-25 11:11:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 11:11:05,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:11:05,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:11:05,151 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:11:05,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:11:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1267394549, now seen corresponding path program 1 times [2020-09-25 11:11:05,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:11:05,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654703655] [2020-09-25 11:11:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:11:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:05,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:05,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:05,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:06,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:06,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 11:11:06,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:11:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-09-25 11:11:06,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:06,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:11:06,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:11:06,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:11:06,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:11:06,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:11:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:06,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:06,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:06,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:11:06,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:11:06,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:11:06,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:06,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:11:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:11:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:11:06,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:11:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:11:06,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654703655] [2020-09-25 11:11:06,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:11:06,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 11:11:06,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372363893] [2020-09-25 11:11:06,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:11:06,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:11:06,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:11:06,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:11:06,394 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 7 states. [2020-09-25 11:11:06,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:11:06,804 INFO L93 Difference]: Finished difference Result 190 states and 224 transitions. [2020-09-25 11:11:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:11:06,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-25 11:11:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:11:06,820 INFO L225 Difference]: With dead ends: 190 [2020-09-25 11:11:06,820 INFO L226 Difference]: Without dead ends: 83 [2020-09-25 11:11:06,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:11:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-25 11:11:06,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2020-09-25 11:11:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 11:11:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-09-25 11:11:06,886 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 26 [2020-09-25 11:11:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:11:06,887 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-09-25 11:11:06,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:11:06,888 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-09-25 11:11:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 11:11:06,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:11:06,890 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:11:06,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:11:06,891 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:11:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:11:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash 798924263, now seen corresponding path program 1 times [2020-09-25 11:11:06,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:11:06,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597758463] [2020-09-25 11:11:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:11:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:06,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:07,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:07,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 11:11:07,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:11:07,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-09-25 11:11:07,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:07,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:11:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:11:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 11:11:07,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:11:07,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:11:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:07,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:07,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:07,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:11:07,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:11:07,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 11:11:07,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:07,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:11:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:11:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:11:07,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:11:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:11:07,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597758463] [2020-09-25 11:11:07,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:11:07,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:11:07,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144901259] [2020-09-25 11:11:07,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:11:07,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:11:07,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:11:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:11:07,242 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 4 states. [2020-09-25 11:11:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:11:07,459 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-09-25 11:11:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:11:07,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 11:11:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:11:07,462 INFO L225 Difference]: With dead ends: 118 [2020-09-25 11:11:07,462 INFO L226 Difference]: Without dead ends: 80 [2020-09-25 11:11:07,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:11:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-25 11:11:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2020-09-25 11:11:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 11:11:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-09-25 11:11:07,474 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 41 [2020-09-25 11:11:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:11:07,474 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-09-25 11:11:07,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:11:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-09-25 11:11:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 11:11:07,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:11:07,476 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:11:07,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:11:07,477 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:11:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:11:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash -223654578, now seen corresponding path program 1 times [2020-09-25 11:11:07,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:11:07,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221594511] [2020-09-25 11:11:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:11:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 11:11:07,505 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 11:11:07,505 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 11:11:07,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:11:07,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:11:07 BoogieIcfgContainer [2020-09-25 11:11:07,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:11:07,543 INFO L168 Benchmark]: Toolchain (without parser) took 3999.92 ms. Allocated memory was 141.6 MB in the beginning and 244.8 MB in the end (delta: 103.3 MB). Free memory was 103.7 MB in the beginning and 199.8 MB in the end (delta: -96.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:11:07,544 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 11:11:07,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 653.66 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.0 MB in the beginning and 172.2 MB in the end (delta: -69.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:11:07,546 INFO L168 Benchmark]: Boogie Preprocessor took 115.79 ms. Allocated memory is still 205.5 MB. Free memory was 172.2 MB in the beginning and 169.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-25 11:11:07,547 INFO L168 Benchmark]: RCFGBuilder took 698.00 ms. Allocated memory is still 205.5 MB. Free memory was 169.4 MB in the beginning and 121.4 MB in the end (delta: 47.9 MB). Peak memory consumption was 47.9 MB. Max. memory is 7.1 GB. [2020-09-25 11:11:07,548 INFO L168 Benchmark]: TraceAbstraction took 2522.24 ms. Allocated memory was 205.5 MB in the beginning and 244.8 MB in the end (delta: 39.3 MB). Free memory was 120.8 MB in the beginning and 199.8 MB in the end (delta: -79.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 11:11:07,553 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 653.66 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.0 MB in the beginning and 172.2 MB in the end (delta: -69.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.79 ms. Allocated memory is still 205.5 MB. Free memory was 172.2 MB in the beginning and 169.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 698.00 ms. Allocated memory is still 205.5 MB. Free memory was 169.4 MB in the beginning and 121.4 MB in the end (delta: 47.9 MB). Peak memory consumption was 47.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2522.24 ms. Allocated memory was 205.5 MB in the beginning and 244.8 MB in the end (delta: 39.3 MB). Free memory was 120.8 MB in the beginning and 199.8 MB in the end (delta: -79.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 562]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List p = a; [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 [L542] EXPR p->h [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 130 SDtfs, 136 SDslu, 267 SDs, 0 SdLazy, 254 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 39 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 4330 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 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...