/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/for_infinite_loop_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-28 09:00:10,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-28 09:00:10,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-28 09:00:10,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-28 09:00:10,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-28 09:00:10,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-28 09:00:10,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-28 09:00:10,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-28 09:00:10,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-28 09:00:10,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-28 09:00:10,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-28 09:00:10,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-28 09:00:10,454 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-28 09:00:10,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-28 09:00:10,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-28 09:00:10,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-28 09:00:10,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-28 09:00:10,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-28 09:00:10,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-28 09:00:10,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-28 09:00:10,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-28 09:00:10,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-28 09:00:10,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-28 09:00:10,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-28 09:00:10,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-28 09:00:10,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-28 09:00:10,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-28 09:00:10,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-28 09:00:10,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-28 09:00:10,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-28 09:00:10,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-28 09:00:10,483 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-28 09:00:10,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-28 09:00:10,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-28 09:00:10,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-28 09:00:10,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-28 09:00:10,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-28 09:00:10,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 09:00:10,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-28 09:00:10,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-28 09:00:10,483 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-28 09:00:10,484 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-28 09:00:10,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-28 09:00:10,484 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-28 09:00:10,484 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-28 09:00:10,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-28 09:00:10,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-28 09:00:10,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-28 09:00:10,684 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-28 09:00:10,685 INFO L275 PluginConnector]: CDTParser initialized [2022-04-28 09:00:10,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_2.c [2022-04-28 09:00:10,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a0ff24bc/df4f62727e41402b874ab24f89e55dc7/FLAGd5497b9da [2022-04-28 09:00:11,105 INFO L306 CDTParser]: Found 1 translation units. [2022-04-28 09:00:11,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_2.c [2022-04-28 09:00:11,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a0ff24bc/df4f62727e41402b874ab24f89e55dc7/FLAGd5497b9da [2022-04-28 09:00:11,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a0ff24bc/df4f62727e41402b874ab24f89e55dc7 [2022-04-28 09:00:11,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-28 09:00:11,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-28 09:00:11,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-28 09:00:11,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-28 09:00:11,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-28 09:00:11,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a866b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11, skipping insertion in model container [2022-04-28 09:00:11,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-28 09:00:11,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-28 09:00:11,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_2.c[418,431] [2022-04-28 09:00:11,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 09:00:11,268 INFO L203 MainTranslator]: Completed pre-run [2022-04-28 09:00:11,278 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_2.c[418,431] [2022-04-28 09:00:11,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 09:00:11,289 INFO L208 MainTranslator]: Completed translation [2022-04-28 09:00:11,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11 WrapperNode [2022-04-28 09:00:11,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-28 09:00:11,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-28 09:00:11,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-28 09:00:11,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-28 09:00:11,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-28 09:00:11,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-28 09:00:11,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-28 09:00:11,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-28 09:00:11,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (1/1) ... [2022-04-28 09:00:11,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 09:00:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 09:00:11,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-28 09:00:11,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-28 09:00:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-28 09:00:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-28 09:00:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-28 09:00:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-28 09:00:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-28 09:00:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-28 09:00:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-28 09:00:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-28 09:00:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-28 09:00:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-28 09:00:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-28 09:00:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-28 09:00:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-28 09:00:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-28 09:00:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-28 09:00:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-28 09:00:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-28 09:00:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-28 09:00:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-28 09:00:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-28 09:00:11,429 INFO L234 CfgBuilder]: Building ICFG [2022-04-28 09:00:11,430 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-28 09:00:11,590 INFO L275 CfgBuilder]: Performing block encoding [2022-04-28 09:00:11,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-28 09:00:11,619 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-28 09:00:11,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:00:11 BoogieIcfgContainer [2022-04-28 09:00:11,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-28 09:00:11,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-28 09:00:11,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-28 09:00:11,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-28 09:00:11,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.04 09:00:11" (1/3) ... [2022-04-28 09:00:11,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe52269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:00:11, skipping insertion in model container [2022-04-28 09:00:11,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 09:00:11" (2/3) ... [2022-04-28 09:00:11,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe52269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:00:11, skipping insertion in model container [2022-04-28 09:00:11,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:00:11" (3/3) ... [2022-04-28 09:00:11,647 INFO L111 eAbstractionObserver]: Analyzing ICFG for_infinite_loop_2.c [2022-04-28 09:00:11,663 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-28 09:00:11,663 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-28 09:00:11,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-28 09:00:11,755 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13463fb1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@441b925a [2022-04-28 09:00:11,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-28 09:00:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 09:00:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 09:00:11,780 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 09:00:11,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 09:00:11,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 09:00:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 09:00:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash -782341743, now seen corresponding path program 1 times [2022-04-28 09:00:11,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 09:00:11,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1097130775] [2022-04-28 09:00:11,822 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 09:00:11,822 INFO L85 PathProgramCache]: Analyzing trace with hash -782341743, now seen corresponding path program 2 times [2022-04-28 09:00:11,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 09:00:11,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91799773] [2022-04-28 09:00:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 09:00:11,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 09:00:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 09:00:12,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 09:00:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 09:00:12,158 INFO L290 TraceCheckUtils]: 0: Hoare triple {29#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(22, 2);call #Ultimate.allocInit(12, 3); {24#true} is VALID [2022-04-28 09:00:12,162 INFO L290 TraceCheckUtils]: 1: Hoare triple {24#true} assume true; {24#true} is VALID [2022-04-28 09:00:12,163 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {24#true} {24#true} #52#return; {24#true} is VALID [2022-04-28 09:00:12,165 INFO L272 TraceCheckUtils]: 0: Hoare triple {24#true} call ULTIMATE.init(); {29#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 09:00:12,165 INFO L290 TraceCheckUtils]: 1: Hoare triple {29#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(22, 2);call #Ultimate.allocInit(12, 3); {24#true} is VALID [2022-04-28 09:00:12,165 INFO L290 TraceCheckUtils]: 2: Hoare triple {24#true} assume true; {24#true} is VALID [2022-04-28 09:00:12,165 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {24#true} {24#true} #52#return; {24#true} is VALID [2022-04-28 09:00:12,166 INFO L272 TraceCheckUtils]: 4: Hoare triple {24#true} call #t~ret6 := main(); {24#true} is VALID [2022-04-28 09:00:12,170 INFO L290 TraceCheckUtils]: 5: Hoare triple {24#true} ~i~0 := 0;~x~0 := 0;~y~0 := 0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~n~0 := #t~nondet4;havoc #t~nondet4; {24#true} is VALID [2022-04-28 09:00:12,170 INFO L290 TraceCheckUtils]: 6: Hoare triple {24#true} assume !!(~n~0 > 0);~i~0 := 0; {24#true} is VALID [2022-04-28 09:00:12,171 INFO L290 TraceCheckUtils]: 7: Hoare triple {24#true} assume false; {25#false} is VALID [2022-04-28 09:00:12,172 INFO L272 TraceCheckUtils]: 8: Hoare triple {25#false} call __VERIFIER_assert((if 0 != ~x~0 then 1 else 0)); {25#false} is VALID [2022-04-28 09:00:12,172 INFO L290 TraceCheckUtils]: 9: Hoare triple {25#false} ~cond := #in~cond; {25#false} is VALID [2022-04-28 09:00:12,172 INFO L290 TraceCheckUtils]: 10: Hoare triple {25#false} assume 0 == ~cond; {25#false} is VALID [2022-04-28 09:00:12,173 INFO L290 TraceCheckUtils]: 11: Hoare triple {25#false} assume !false; {25#false} is VALID [2022-04-28 09:00:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 09:00:12,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 09:00:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91799773] [2022-04-28 09:00:12,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91799773] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 09:00:12,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 09:00:12,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 09:00:12,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 09:00:12,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1097130775] [2022-04-28 09:00:12,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1097130775] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 09:00:12,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 09:00:12,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 09:00:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273571613] [2022-04-28 09:00:12,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 09:00:12,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 09:00:12,206 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 09:00:12,208 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:12,243 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 09:00:12,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-28 09:00:12,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 09:00:12,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-28 09:00:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 09:00:12,292 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:12,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 09:00:12,406 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-04-28 09:00:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-28 09:00:12,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 09:00:12,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 09:00:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2022-04-28 09:00:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2022-04-28 09:00:12,420 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 41 transitions. [2022-04-28 09:00:12,502 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 09:00:12,508 INFO L225 Difference]: With dead ends: 34 [2022-04-28 09:00:12,509 INFO L226 Difference]: Without dead ends: 16 [2022-04-28 09:00:12,511 INFO L412 NwaCegarLoop]: 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 [2022-04-28 09:00:12,528 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 09:00:12,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 09:00:12,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-28 09:00:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-28 09:00:12,573 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 09:00:12,573 INFO L82 GeneralOperation]: Start isEquivalent. First operand 16 states. Second operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 09:00:12,574 INFO L74 IsIncluded]: Start isIncluded. First operand 16 states. Second operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 09:00:12,574 INFO L87 Difference]: Start difference. First operand 16 states. Second operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 09:00:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 09:00:12,593 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-04-28 09:00:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-04-28 09:00:12,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 09:00:12,594 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 09:00:12,594 INFO L74 IsIncluded]: Start isIncluded. First operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 16 states. [2022-04-28 09:00:12,594 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 16 states. [2022-04-28 09:00:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 09:00:12,596 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-04-28 09:00:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-04-28 09:00:12,597 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 09:00:12,597 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 09:00:12,597 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 09:00:12,597 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 09:00:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 09:00:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-04-28 09:00:12,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2022-04-28 09:00:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 09:00:12,599 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-04-28 09:00:12,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:12,601 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 16 states and 16 transitions. [2022-04-28 09:00:12,634 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 09:00:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-04-28 09:00:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 09:00:12,637 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 09:00:12,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 09:00:12,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-28 09:00:12,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 09:00:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 09:00:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash -780554283, now seen corresponding path program 1 times [2022-04-28 09:00:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 09:00:12,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973046079] [2022-04-28 09:00:12,648 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 09:00:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash -780554283, now seen corresponding path program 2 times [2022-04-28 09:00:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 09:00:12,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959708635] [2022-04-28 09:00:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 09:00:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 09:00:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 09:00:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 09:00:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 09:00:12,838 INFO L290 TraceCheckUtils]: 0: Hoare triple {172#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(22, 2);call #Ultimate.allocInit(12, 3); {164#true} is VALID [2022-04-28 09:00:12,838 INFO L290 TraceCheckUtils]: 1: Hoare triple {164#true} assume true; {164#true} is VALID [2022-04-28 09:00:12,838 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {164#true} {164#true} #52#return; {164#true} is VALID [2022-04-28 09:00:12,839 INFO L272 TraceCheckUtils]: 0: Hoare triple {164#true} call ULTIMATE.init(); {172#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 09:00:12,839 INFO L290 TraceCheckUtils]: 1: Hoare triple {172#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(22, 2);call #Ultimate.allocInit(12, 3); {164#true} is VALID [2022-04-28 09:00:12,840 INFO L290 TraceCheckUtils]: 2: Hoare triple {164#true} assume true; {164#true} is VALID [2022-04-28 09:00:12,840 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {164#true} {164#true} #52#return; {164#true} is VALID [2022-04-28 09:00:12,840 INFO L272 TraceCheckUtils]: 4: Hoare triple {164#true} call #t~ret6 := main(); {164#true} is VALID [2022-04-28 09:00:12,841 INFO L290 TraceCheckUtils]: 5: Hoare triple {164#true} ~i~0 := 0;~x~0 := 0;~y~0 := 0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~n~0 := #t~nondet4;havoc #t~nondet4; {169#(= main_~x~0 0)} is VALID [2022-04-28 09:00:12,841 INFO L290 TraceCheckUtils]: 6: Hoare triple {169#(= main_~x~0 0)} assume !!(~n~0 > 0);~i~0 := 0; {169#(= main_~x~0 0)} is VALID [2022-04-28 09:00:12,841 INFO L290 TraceCheckUtils]: 7: Hoare triple {169#(= main_~x~0 0)} assume !false; {169#(= main_~x~0 0)} is VALID [2022-04-28 09:00:12,842 INFO L272 TraceCheckUtils]: 8: Hoare triple {169#(= main_~x~0 0)} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {170#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 09:00:12,843 INFO L290 TraceCheckUtils]: 9: Hoare triple {170#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {171#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-28 09:00:12,843 INFO L290 TraceCheckUtils]: 10: Hoare triple {171#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {165#false} is VALID [2022-04-28 09:00:12,844 INFO L290 TraceCheckUtils]: 11: Hoare triple {165#false} assume !false; {165#false} is VALID [2022-04-28 09:00:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 09:00:12,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 09:00:12,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959708635] [2022-04-28 09:00:12,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959708635] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 09:00:12,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 09:00:12,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-28 09:00:12,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 09:00:12,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973046079] [2022-04-28 09:00:12,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973046079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 09:00:12,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 09:00:12,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-28 09:00:12,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448787140] [2022-04-28 09:00:12,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 09:00:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 09:00:12,848 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 09:00:12,848 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:12,875 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 09:00:12,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-28 09:00:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 09:00:12,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-28 09:00:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-28 09:00:12,877 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:13,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 09:00:13,011 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-04-28 09:00:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-28 09:00:13,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 09:00:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 09:00:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 16 transitions. [2022-04-28 09:00:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 16 transitions. [2022-04-28 09:00:13,013 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 16 transitions. [2022-04-28 09:00:13,028 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 09:00:13,029 INFO L225 Difference]: With dead ends: 16 [2022-04-28 09:00:13,029 INFO L226 Difference]: Without dead ends: 0 [2022-04-28 09:00:13,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-28 09:00:13,030 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 09:00:13,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 09:00:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-28 09:00:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-28 09:00:13,031 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 09:00:13,032 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 09:00:13,032 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 09:00:13,032 INFO L87 Difference]: Start difference. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 09:00:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 09:00:13,032 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-28 09:00:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 09:00:13,032 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 09:00:13,032 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 09:00:13,032 INFO L74 IsIncluded]: Start isIncluded. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-28 09:00:13,033 INFO L87 Difference]: Start difference. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-28 09:00:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 09:00:13,033 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-28 09:00:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 09:00:13,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 09:00:13,033 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 09:00:13,033 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 09:00:13,033 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 09:00:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 09:00:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-28 09:00:13,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2022-04-28 09:00:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 09:00:13,034 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-28 09:00:13,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 09:00:13,034 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 0 states and 0 transitions. [2022-04-28 09:00:13,034 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 09:00:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 09:00:13,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 09:00:13,037 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-28 09:00:13,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-28 09:00:13,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-28 09:00:13,098 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-04-28 09:00:13,098 INFO L899 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-04-28 09:00:13,098 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-04-28 09:00:13,098 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2022-04-28 09:00:13,099 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-04-28 09:00:13,099 INFO L899 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2022-04-28 09:00:13,099 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-04-28 09:00:13,099 INFO L902 garLoopResultBuilder]: At program point mainENTRY(lines 18 28) the Hoare annotation is: true [2022-04-28 09:00:13,099 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (= main_~x~0 0) [2022-04-28 09:00:13,099 INFO L902 garLoopResultBuilder]: At program point mainEXIT(lines 18 28) the Hoare annotation is: true [2022-04-28 09:00:13,099 INFO L895 garLoopResultBuilder]: At program point L25-1(lines 23 26) the Hoare annotation is: (= main_~x~0 0) [2022-04-28 09:00:13,099 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (= main_~x~0 0) [2022-04-28 09:00:13,099 INFO L895 garLoopResultBuilder]: At program point L23-2(lines 23 26) the Hoare annotation is: (= main_~x~0 0) [2022-04-28 09:00:13,100 INFO L895 garLoopResultBuilder]: At program point L23-3(lines 23 26) the Hoare annotation is: false [2022-04-28 09:00:13,100 INFO L902 garLoopResultBuilder]: At program point mainFINAL(lines 18 28) the Hoare annotation is: true [2022-04-28 09:00:13,100 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-28 09:00:13,100 INFO L895 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-28 09:00:13,100 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-28 09:00:13,100 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-28 09:00:13,100 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-28 09:00:13,100 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-28 09:00:13,100 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-28 09:00:13,100 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2022-04-28 09:00:13,101 INFO L895 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-28 09:00:13,101 INFO L895 garLoopResultBuilder]: At program point L10(lines 10 12) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-28 09:00:13,101 INFO L895 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 14) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-28 09:00:13,101 INFO L895 garLoopResultBuilder]: At program point L10-2(lines 9 14) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-28 09:00:13,101 INFO L895 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-28 09:00:13,103 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2] [2022-04-28 09:00:13,105 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-04-28 09:00:13,107 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-28 09:00:13,108 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-28 09:00:13,109 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-28 09:00:13,109 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2022-04-28 09:00:13,109 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2022-04-28 09:00:13,110 WARN L170 areAnnotationChecker]: L7-2 has no Hoare annotation [2022-04-28 09:00:13,113 INFO L163 areAnnotationChecker]: CFG has 25 edges. 25 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-28 09:00:13,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 09:00:13 BoogieIcfgContainer [2022-04-28 09:00:13,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-28 09:00:13,121 INFO L158 Benchmark]: Toolchain (without parser) took 2000.64ms. Allocated memory was 192.9MB in the beginning and 246.4MB in the end (delta: 53.5MB). Free memory was 145.3MB in the beginning and 213.2MB in the end (delta: -67.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-28 09:00:13,121 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 192.9MB. Free memory was 161.3MB in the beginning and 161.2MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-28 09:00:13,121 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.12ms. Allocated memory is still 192.9MB. Free memory was 145.0MB in the beginning and 171.9MB in the end (delta: -26.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-28 09:00:13,121 INFO L158 Benchmark]: Boogie Preprocessor took 32.42ms. Allocated memory is still 192.9MB. Free memory was 171.9MB in the beginning and 170.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-28 09:00:13,122 INFO L158 Benchmark]: RCFGBuilder took 297.16ms. Allocated memory is still 192.9MB. Free memory was 170.2MB in the beginning and 160.3MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-28 09:00:13,122 INFO L158 Benchmark]: TraceAbstraction took 1489.34ms. Allocated memory was 192.9MB in the beginning and 246.4MB in the end (delta: 53.5MB). Free memory was 159.7MB in the beginning and 213.2MB in the end (delta: -53.5MB). Peak memory consumption was 364.6kB. Max. memory is 8.0GB. [2022-04-28 09:00:13,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 192.9MB. Free memory was 161.3MB in the beginning and 161.2MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 169.12ms. Allocated memory is still 192.9MB. Free memory was 145.0MB in the beginning and 171.9MB in the end (delta: -26.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.42ms. Allocated memory is still 192.9MB. Free memory was 171.9MB in the beginning and 170.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 297.16ms. Allocated memory is still 192.9MB. Free memory was 170.2MB in the beginning and 160.3MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1489.34ms. Allocated memory was 192.9MB in the beginning and 246.4MB in the end (delta: 53.5MB). Free memory was 159.7MB in the beginning and 213.2MB in the end (delta: -53.5MB). Peak memory consumption was 364.6kB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24 mSDsluCounter, 50 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22 IncrementalHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 30 mSDtfsCounter, 22 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 33 PreInvPairs, 42 NumberOfFragments, 60 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 21 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: x == 0 - ProcedureContractResult [Line: 18]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! [2022-04-28 09:00:13,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...