/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-eb0fd7c [2020-09-21 12:25:53,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:53,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:53,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:53,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:53,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:53,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:53,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:53,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:53,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:53,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:53,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:53,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:53,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:53,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:53,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:53,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:53,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:53,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:53,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:53,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:53,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:53,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:53,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:53,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:53,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:53,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:53,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:53,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:53,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:53,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:53,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:53,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:53,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:53,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:53,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:53,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:53,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:53,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:53,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:53,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:53,638 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 [2020-09-21 12:25:53,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:53,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:53,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:53,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:53,666 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:53,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:53,666 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:53,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:53,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:53,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:53,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:53,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:53,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:53,668 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:53,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:53,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:53,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:53,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:53,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:53,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:53,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:53,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:53,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:53,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:53,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:53,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:53,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:53,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:53,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:53,671 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:25:54,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:54,158 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:54,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:54,166 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:54,167 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:54,168 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-21 12:25:54,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe8021f78/312963d55d3f4d4fa259b60e255ad34b/FLAG249c842ff [2020-09-21 12:25:54,930 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:54,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-21 12:25:54,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe8021f78/312963d55d3f4d4fa259b60e255ad34b/FLAG249c842ff [2020-09-21 12:25:55,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe8021f78/312963d55d3f4d4fa259b60e255ad34b [2020-09-21 12:25:55,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:55,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:55,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:55,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:55,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:55,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f0865a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55, skipping insertion in model container [2020-09-21 12:25:55,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:55,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:55,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:55,765 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:55,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:55,886 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:55,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55 WrapperNode [2020-09-21 12:25:55,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:55,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:55,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:55,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:55,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:55,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:55,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:55,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:55,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (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 [2020-09-21 12:25:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:56,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 12:25:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 12:25:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-21 12:25:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-21 12:25:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-21 12:25:56,054 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 12:25:56,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:56,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:56,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:25:56,055 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 12:25:56,056 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 12:25:56,056 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 12:25:56,056 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 12:25:56,056 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 12:25:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 12:25:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 12:25:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 12:25:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 12:25:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 12:25:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-21 12:25:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-21 12:25:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-21 12:25:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 12:25:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 12:25:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 12:25:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 12:25:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 12:25:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 12:25:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 12:25:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 12:25:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 12:25:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 12:25:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 12:25:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 12:25:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 12:25:56,062 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 12:25:56,062 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 12:25:56,062 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 12:25:56,062 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 12:25:56,062 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 12:25:56,062 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 12:25:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 12:25:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 12:25:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 12:25:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 12:25:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 12:25:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 12:25:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 12:25:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 12:25:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 12:25:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 12:25:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 12:25:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 12:25:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 12:25:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 12:25:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 12:25:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:25:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:25:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 12:25:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:25:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 12:25:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 12:25:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 12:25:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 12:25:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:25:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 12:25:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 12:25:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 12:25:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:25:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 12:25:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 12:25:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 12:25:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 12:25:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 12:25:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 12:25:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 12:25:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 12:25:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 12:25:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 12:25:56,069 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 12:25:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 12:25:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 12:25:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 12:25:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 12:25:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 12:25:56,070 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 12:25:56,071 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 12:25:56,071 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 12:25:56,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 12:25:56,071 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 12:25:56,071 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 12:25:56,071 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 12:25:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 12:25:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 12:25:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 12:25:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 12:25:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 12:25:56,072 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 12:25:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 12:25:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 12:25:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 12:25:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 12:25:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 12:25:56,073 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 12:25:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 12:25:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 12:25:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 12:25:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 12:25:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 12:25:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:25:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:25:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:25:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:25:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:25:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:25:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:56,491 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 12:25:56,662 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:56,663 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 12:25:56,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:56 BoogieIcfgContainer [2020-09-21 12:25:56,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:56,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:56,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:56,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:56,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:55" (1/3) ... [2020-09-21 12:25:56,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a02684a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:56, skipping insertion in model container [2020-09-21 12:25:56,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55" (2/3) ... [2020-09-21 12:25:56,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a02684a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:56, skipping insertion in model container [2020-09-21 12:25:56,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:56" (3/3) ... [2020-09-21 12:25:56,686 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-09-21 12:25:56,698 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:56,709 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:56,732 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:56,760 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:56,760 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:56,760 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:56,760 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:56,760 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:56,760 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:56,760 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:56,761 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-21 12:25:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 12:25:56,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:56,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:56,789 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash 209903222, now seen corresponding path program 1 times [2020-09-21 12:25:56,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:56,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878632643] [2020-09-21 12:25:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:57,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:25:57,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:57,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-09-21 12:25:57,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:57,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:57,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:57,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:57,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:25:57,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:57,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:57,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:57,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:57,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:25:57,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:57,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:57,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878632643] [2020-09-21 12:25:57,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:57,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:57,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564195135] [2020-09-21 12:25:57,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:57,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:57,469 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-21 12:25:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:57,615 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-09-21 12:25:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:57,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-21 12:25:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:57,629 INFO L225 Difference]: With dead ends: 52 [2020-09-21 12:25:57,630 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 12:25:57,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 12:25:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-21 12:25:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 12:25:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-09-21 12:25:57,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2020-09-21 12:25:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:57,685 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-09-21 12:25:57,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-09-21 12:25:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 12:25:57,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:57,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:57,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:57,687 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:57,687 INFO L82 PathProgramCache]: Analyzing trace with hash 919137993, now seen corresponding path program 1 times [2020-09-21 12:25:57,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:57,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003883924] [2020-09-21 12:25:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:57,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:25:58,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:58,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-09-21 12:25:58,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:25:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:25:58,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:58,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:58,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:25:58,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:58,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:58,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:58,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:58,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003883924] [2020-09-21 12:25:58,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:58,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:25:58,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621523079] [2020-09-21 12:25:58,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:25:58,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:58,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:25:58,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:25:58,083 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-09-21 12:25:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:58,160 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-09-21 12:25:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:25:58,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 12:25:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:58,162 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:25:58,162 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 12:25:58,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:25:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 12:25:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-09-21 12:25:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 12:25:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-09-21 12:25:58,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-09-21 12:25:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:58,173 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-09-21 12:25:58,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:25:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-09-21 12:25:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 12:25:58,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:58,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:58,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:25:58,175 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:58,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:58,176 INFO L82 PathProgramCache]: Analyzing trace with hash 919131049, now seen corresponding path program 1 times [2020-09-21 12:25:58,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:58,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128477412] [2020-09-21 12:25:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:25:58,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-21 12:25:58,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:25:58,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:58,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:25:58,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:58,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:58,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:25:58,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:58,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:58,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:58,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:58,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128477412] [2020-09-21 12:25:58,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:58,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:25:58,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687439227] [2020-09-21 12:25:58,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:25:58,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:58,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:25:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:25:58,353 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-09-21 12:25:58,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:58,462 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-09-21 12:25:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:25:58,463 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-21 12:25:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:58,464 INFO L225 Difference]: With dead ends: 61 [2020-09-21 12:25:58,464 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 12:25:58,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:25:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 12:25:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-09-21 12:25:58,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:25:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-09-21 12:25:58,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2020-09-21 12:25:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:58,473 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-09-21 12:25:58,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:25:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-09-21 12:25:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:58,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:58,474 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] [2020-09-21 12:25:58,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:25:58,475 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:58,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1446652468, now seen corresponding path program 1 times [2020-09-21 12:25:58,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:58,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195317047] [2020-09-21 12:25:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:25:58,500 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:25:58,500 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:25:58,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:25:58,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:25:58 BoogieIcfgContainer [2020-09-21 12:25:58,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:25:58,530 INFO L168 Benchmark]: Toolchain (without parser) took 3367.24 ms. Allocated memory was 138.9 MB in the beginning and 235.9 MB in the end (delta: 97.0 MB). Free memory was 100.8 MB in the beginning and 119.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 78.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:58,531 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:25:58,532 INFO L168 Benchmark]: CACSL2BoogieTranslator took 720.84 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 100.1 MB in the beginning and 170.3 MB in the end (delta: -70.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:58,533 INFO L168 Benchmark]: Boogie Preprocessor took 76.42 ms. Allocated memory is still 203.9 MB. Free memory was 170.3 MB in the beginning and 167.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:58,534 INFO L168 Benchmark]: RCFGBuilder took 709.35 ms. Allocated memory is still 203.9 MB. Free memory was 167.5 MB in the beginning and 122.7 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:58,535 INFO L168 Benchmark]: TraceAbstraction took 1850.14 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 122.0 MB in the beginning and 119.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:58,539 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 720.84 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 100.1 MB in the beginning and 170.3 MB in the end (delta: -70.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.42 ms. Allocated memory is still 203.9 MB. Free memory was 170.3 MB in the beginning and 167.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 709.35 ms. Allocated memory is still 203.9 MB. Free memory was 167.5 MB in the beginning and 122.7 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1850.14 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 122.0 MB in the beginning and 119.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 34.9 MB. 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, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 26 SDslu, 73 SDs, 0 SdLazy, 130 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 1522 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...