/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=LOWLEXORDER --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 18:16:01,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:16:01,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:16:01,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:16:01,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:16:01,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:16:01,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:16:01,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:16:01,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:16:01,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:16:01,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:16:01,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:16:01,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:16:01,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:16:01,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:16:01,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:16:01,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:16:01,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:16:01,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:16:01,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:16:01,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:16:01,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:16:01,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:16:01,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:16:01,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:16:01,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:16:01,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:16:01,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:16:01,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:16:01,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:16:01,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:16:01,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:16:01,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:16:01,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:16:01,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:16:01,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:16:01,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:16:01,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:16:01,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:16:01,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:16:01,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:16:01,884 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 18:16:01,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:16:01,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:16:01,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:16:01,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:16:01,921 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:16:01,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:16:01,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:16:01,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:16:01,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:16:01,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:16:01,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:16:01,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:16:01,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:16:01,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:16:01,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:16:01,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:16:01,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:16:01,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:16:01,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:16:01,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:16:01,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:16:01,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:16:01,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:16:01,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:16:01,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:16:01,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:16:01,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:16:01,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:16:01,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:16:01,926 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:16:02,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:16:02,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:16:02,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:16:02,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:16:02,299 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:16:02,300 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_01.c [2020-08-21 18:16:02,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/943930169/fbbf117d49c142e0a5db8511ef07bbc9/FLAGe35922eec [2020-08-21 18:16:02,804 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:16:02,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/terminator_01.c [2020-08-21 18:16:02,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/943930169/fbbf117d49c142e0a5db8511ef07bbc9/FLAGe35922eec [2020-08-21 18:16:03,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/943930169/fbbf117d49c142e0a5db8511ef07bbc9 [2020-08-21 18:16:03,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:16:03,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:16:03,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:16:03,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:16:03,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:16:03,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177c5926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03, skipping insertion in model container [2020-08-21 18:16:03,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:16:03,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:16:03,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:16:03,408 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:16:03,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:16:03,439 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:16:03,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03 WrapperNode [2020-08-21 18:16:03,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:16:03,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:16:03,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:16:03,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:16:03,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:16:03,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:16:03,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:16:03,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:16:03,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (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 18:16:03,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:16:03,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:16:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:16:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:16:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:16:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:16:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:16:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:16:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:16:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 18:16:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:16:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:16:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:16:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:16:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:16:03,847 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:16:03,847 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:16:03,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:16:03 BoogieIcfgContainer [2020-08-21 18:16:03,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:16:03,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:16:03,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:16:03,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:16:03,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:16:03" (1/3) ... [2020-08-21 18:16:03,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3e9bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:16:03, skipping insertion in model container [2020-08-21 18:16:03,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (2/3) ... [2020-08-21 18:16:03,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3e9bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:16:03, skipping insertion in model container [2020-08-21 18:16:03,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:16:03" (3/3) ... [2020-08-21 18:16:03,860 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_01.c [2020-08-21 18:16:03,875 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:16:03,882 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:16:03,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:16:03,925 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:16:03,926 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:16:03,926 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:16:03,926 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:16:03,926 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:16:03,926 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:16:03,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:16:03,927 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:16:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 18:16:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 18:16:03,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:03,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:03,997 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:04,003 INFO L82 PathProgramCache]: Analyzing trace with hash -564387615, now seen corresponding path program 1 times [2020-08-21 18:16:04,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:04,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855869027] [2020-08-21 18:16:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:04,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:04,198 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 18:16:04,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855869027] [2020-08-21 18:16:04,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:16:04,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:16:04,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124941389] [2020-08-21 18:16:04,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:16:04,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:04,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:16:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:16:04,227 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-08-21 18:16:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:04,288 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-21 18:16:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:16:04,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-21 18:16:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:04,300 INFO L225 Difference]: With dead ends: 32 [2020-08-21 18:16:04,300 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 18:16:04,304 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 18:16:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 18:16:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 18:16:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 18:16:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-21 18:16:04,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-21 18:16:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:04,348 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-21 18:16:04,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:16:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-21 18:16:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 18:16:04,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:04,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:04,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:16:04,351 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:04,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:04,352 INFO L82 PathProgramCache]: Analyzing trace with hash -538271495, now seen corresponding path program 1 times [2020-08-21 18:16:04,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:04,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809077322] [2020-08-21 18:16:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:16:04,381 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:16:04,381 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:16:04,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:16:04,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:16:04 BoogieIcfgContainer [2020-08-21 18:16:04,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:16:04,409 INFO L168 Benchmark]: Toolchain (without parser) took 1204.03 ms. Allocated memory was 137.4 MB in the beginning and 199.2 MB in the end (delta: 61.9 MB). Free memory was 100.2 MB in the beginning and 137.1 MB in the end (delta: -36.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:04,411 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:16:04,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.72 ms. Allocated memory is still 137.4 MB. Free memory was 100.0 MB in the beginning and 90.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:04,413 INFO L168 Benchmark]: Boogie Preprocessor took 120.85 ms. Allocated memory was 137.4 MB in the beginning and 199.2 MB in the end (delta: 61.9 MB). Free memory was 90.2 MB in the beginning and 177.1 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:04,414 INFO L168 Benchmark]: RCFGBuilder took 289.46 ms. Allocated memory is still 199.2 MB. Free memory was 177.1 MB in the beginning and 163.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:04,415 INFO L168 Benchmark]: TraceAbstraction took 553.36 ms. Allocated memory is still 199.2 MB. Free memory was 162.7 MB in the beginning and 137.1 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:04,419 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.72 ms. Allocated memory is still 137.4 MB. Free memory was 100.0 MB in the beginning and 90.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.85 ms. Allocated memory was 137.4 MB in the beginning and 199.2 MB in the end (delta: 61.9 MB). Free memory was 90.2 MB in the beginning and 177.1 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 289.46 ms. Allocated memory is still 199.2 MB. Free memory was 177.1 MB in the beginning and 163.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 553.36 ms. Allocated memory is still 199.2 MB. Free memory was 162.7 MB in the beginning and 137.1 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 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: 0.0s, 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...