/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --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/loops/terminator_01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:06:34,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:06:34,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:06:34,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:06:34,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:06:34,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:06:34,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:06:34,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:06:34,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:06:34,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:06:34,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:06:34,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:06:34,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:06:34,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:06:34,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:06:34,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:06:34,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:06:34,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:06:34,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:06:34,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:06:34,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:06:35,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:06:35,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:06:35,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:06:35,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:06:35,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:06:35,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:06:35,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:06:35,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:06:35,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:06:35,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:06:35,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:06:35,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:06:35,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:06:35,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:06:35,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:06:35,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:06:35,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:06:35,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:06:35,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:06:35,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:06:35,023 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 [2020-08-21 23:06:35,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:06:35,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:06:35,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:06:35,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:06:35,062 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:06:35,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:06:35,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:06:35,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:06:35,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:06:35,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:06:35,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:06:35,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:06:35,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:06:35,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:06:35,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:06:35,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:06:35,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:06:35,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:06:35,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:06:35,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:06:35,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:06:35,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:06:35,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:06:35,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:06:35,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:06:35,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:06:35,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:06:35,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:06:35,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:06:35,067 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 -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 23:06:35,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:06:35,387 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:06:35,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:06:35,392 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:06:35,393 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:06:35,393 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_01.c [2020-08-21 23:06:35,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f47698f3/3f646115e5df4240823bd1fcd5efadbd/FLAG276d6a254 [2020-08-21 23:06:35,912 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:06:35,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/terminator_01.c [2020-08-21 23:06:35,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f47698f3/3f646115e5df4240823bd1fcd5efadbd/FLAG276d6a254 [2020-08-21 23:06:36,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f47698f3/3f646115e5df4240823bd1fcd5efadbd [2020-08-21 23:06:36,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:06:36,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:06:36,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:06:36,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:06:36,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:06:36,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc622fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36, skipping insertion in model container [2020-08-21 23:06:36,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:06:36,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:06:36,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:06:36,551 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:06:36,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:06:36,586 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:06:36,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36 WrapperNode [2020-08-21 23:06:36,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:06:36,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:06:36,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:06:36,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:06:36,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (1/1) ... [2020-08-21 23:06:36,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:06:36,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:06:36,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:06:36,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:06:36,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (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 [2020-08-21 23:06:36,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:06:36,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:06:36,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 23:06:36,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 23:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 23:06:36,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 23:06:36,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 23:06:36,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:06:36,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:06:36,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:06:36,970 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:06:36,970 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 23:06:36,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:06:36 BoogieIcfgContainer [2020-08-21 23:06:36,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:06:36,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:06:36,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:06:36,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:06:36,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:06:36" (1/3) ... [2020-08-21 23:06:36,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcaae22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:06:36, skipping insertion in model container [2020-08-21 23:06:36,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:36" (2/3) ... [2020-08-21 23:06:36,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcaae22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:06:36, skipping insertion in model container [2020-08-21 23:06:36,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:06:36" (3/3) ... [2020-08-21 23:06:36,983 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_01.c [2020-08-21 23:06:36,994 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:06:37,001 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:06:37,019 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:06:37,047 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:06:37,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:06:37,047 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:06:37,048 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:06:37,048 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:06:37,048 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:06:37,048 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:06:37,048 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:06:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 23:06:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 23:06:37,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:37,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:06:37,090 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash -564387615, now seen corresponding path program 1 times [2020-08-21 23:06:37,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:37,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564044801] [2020-08-21 23:06:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:37,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:06:37,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564044801] [2020-08-21 23:06:37,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:37,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:06:37,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930509755] [2020-08-21 23:06:37,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:06:37,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:37,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:06:37,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:06:37,337 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-08-21 23:06:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:37,407 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-21 23:06:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:06:37,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-21 23:06:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:37,418 INFO L225 Difference]: With dead ends: 32 [2020-08-21 23:06:37,418 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 23:06:37,422 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 [2020-08-21 23:06:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 23:06:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 23:06:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 23:06:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-21 23:06:37,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-21 23:06:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:37,459 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-21 23:06:37,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:06:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-21 23:06:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 23:06:37,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:37,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:06:37,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:06:37,461 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash -538271495, now seen corresponding path program 1 times [2020-08-21 23:06:37,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:37,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382426596] [2020-08-21 23:06:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:06:37,490 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:06:37,490 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:06:37,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:06:37,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:06:37 BoogieIcfgContainer [2020-08-21 23:06:37,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:06:37,516 INFO L168 Benchmark]: Toolchain (without parser) took 1188.73 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.0 MB in the beginning and 141.5 MB in the end (delta: -38.5 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:37,517 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 23:06:37,518 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.44 ms. Allocated memory is still 140.5 MB. Free memory was 102.6 MB in the beginning and 92.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:37,519 INFO L168 Benchmark]: Boogie Preprocessor took 120.59 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 181.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:37,520 INFO L168 Benchmark]: RCFGBuilder took 266.08 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 168.1 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:37,521 INFO L168 Benchmark]: TraceAbstraction took 536.71 ms. Allocated memory is still 203.4 MB. Free memory was 167.5 MB in the beginning and 141.5 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:37,525 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.44 ms. Allocated memory is still 140.5 MB. Free memory was 102.6 MB in the beginning and 92.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.59 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 181.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 266.08 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 168.1 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 536.71 ms. Allocated memory is still 203.4 MB. Free memory was 167.5 MB in the beginning and 141.5 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x=__VERIFIER_nondet_int(); [L13] int x=__VERIFIER_nondet_int(); [L14] int *p = &x; [L16] EXPR \read(x) [L16] COND FALSE !(x<100) [L19] CALL __VERIFIER_assert(0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 5 SDslu, 4 SDs, 0 SdLazy, 10 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 190 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...