/usr/bin/java -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/trex01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:48:43,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:48:43,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:48:43,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:48:43,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:48:43,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:48:43,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:48:43,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:48:43,623 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:48:43,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:48:43,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:48:43,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:48:43,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:48:43,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:48:43,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:48:43,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:48:43,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:48:43,628 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:48:43,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:48:43,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:48:43,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:48:43,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:48:43,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:48:43,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:48:43,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:48:43,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:48:43,629 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:48:43,630 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:48:43,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:48:43,630 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:48:43,630 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:48:43,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:48:43,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:48:43,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:48:43,866 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:48:43,868 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:48:43,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-2.i [2022-03-20 17:48:43,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/739329447/5dd8184e69f543e68fa111ce30857e6e/FLAG5dd227940 [2022-03-20 17:48:44,314 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:48:44,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-2.i [2022-03-20 17:48:44,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/739329447/5dd8184e69f543e68fa111ce30857e6e/FLAG5dd227940 [2022-03-20 17:48:44,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/739329447/5dd8184e69f543e68fa111ce30857e6e [2022-03-20 17:48:44,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:48:44,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:48:44,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:48:44,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:48:44,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:48:44,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14aef147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44, skipping insertion in model container [2022-03-20 17:48:44,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:48:44,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:48:44,514 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/trex01-2.i[895,908] [2022-03-20 17:48:44,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:48:44,538 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:48:44,546 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/trex01-2.i[895,908] [2022-03-20 17:48:44,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:48:44,566 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:48:44,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44 WrapperNode [2022-03-20 17:48:44,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:48:44,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:48:44,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:48:44,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:48:44,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:48:44,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:48:44,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:48:44,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:48:44,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (1/1) ... [2022-03-20 17:48:44,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:48:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:44,659 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) [2022-03-20 17:48:44,661 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 [2022-03-20 17:48:44,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:48:44,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:48:44,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:48:44,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 17:48:44,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:48:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-03-20 17:48:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:48:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:48:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:48:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 17:48:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 17:48:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:48:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:48:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 17:48:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:48:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-20 17:48:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:48:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-03-20 17:48:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:48:44,762 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:48:44,764 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:48:44,865 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:48:44,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:48:44,872 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 17:48:44,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:48:44 BoogieIcfgContainer [2022-03-20 17:48:44,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:48:44,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:48:44,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:48:44,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:48:44,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:48:44" (1/3) ... [2022-03-20 17:48:44,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c584d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:48:44, skipping insertion in model container [2022-03-20 17:48:44,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:48:44" (2/3) ... [2022-03-20 17:48:44,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c584d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:48:44, skipping insertion in model container [2022-03-20 17:48:44,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:48:44" (3/3) ... [2022-03-20 17:48:44,884 INFO L111 eAbstractionObserver]: Analyzing ICFG trex01-2.i [2022-03-20 17:48:44,889 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:48:44,889 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:48:44,931 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:48:44,937 INFO L340 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 [2022-03-20 17:48:44,937 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:48:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 17:48:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 17:48:44,962 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:44,962 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:44,963 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1897834925, now seen corresponding path program 1 times [2022-03-20 17:48:44,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:44,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1487964855] [2022-03-20 17:48:44,986 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:48:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1897834925, now seen corresponding path program 2 times [2022-03-20 17:48:44,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:44,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723465076] [2022-03-20 17:48:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:44,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:45,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:45,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:45,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723465076] [2022-03-20 17:48:45,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723465076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:45,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:45,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:48:45,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:45,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1487964855] [2022-03-20 17:48:45,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1487964855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:45,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:45,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:48:45,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559760075] [2022-03-20 17:48:45,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:45,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:48:45,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:48:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:48:45,231 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:48:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:45,411 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-03-20 17:48:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:48:45,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 17:48:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:45,425 INFO L225 Difference]: With dead ends: 55 [2022-03-20 17:48:45,426 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 17:48:45,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:48:45,432 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:45,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 51 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:48:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 17:48:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 17:48:45,453 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) [2022-03-20 17:48:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 17:48:45,454 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2022-03-20 17:48:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:45,455 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 17:48:45,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:48:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 17:48:45,455 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 17:48:45,458 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 17:48:45,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:48:45,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 17:48:45,585 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-03-20 17:48:45,585 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-03-20 17:48:45,585 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-03-20 17:48:45,586 INFO L878 garLoopResultBuilder]: At program point L31(lines 25 47) the Hoare annotation is: (<= 1 f_~z~0) [2022-03-20 17:48:45,586 INFO L878 garLoopResultBuilder]: At program point L27(lines 27 29) the Hoare annotation is: (<= 1 f_~z~0) [2022-03-20 17:48:45,586 INFO L885 garLoopResultBuilder]: At program point fEXIT(lines 25 47) the Hoare annotation is: true [2022-03-20 17:48:45,586 INFO L885 garLoopResultBuilder]: At program point L38(lines 38 45) the Hoare annotation is: true [2022-03-20 17:48:45,586 INFO L885 garLoopResultBuilder]: At program point fENTRY(lines 25 47) the Hoare annotation is: true [2022-03-20 17:48:45,587 INFO L885 garLoopResultBuilder]: At program point L38-2(lines 36 46) the Hoare annotation is: true [2022-03-20 17:48:45,587 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (<= 1 f_~z~0) [2022-03-20 17:48:45,587 INFO L885 garLoopResultBuilder]: At program point L36-2(lines 25 47) the Hoare annotation is: true [2022-03-20 17:48:45,587 INFO L878 garLoopResultBuilder]: At program point L30-2(line 30) the Hoare annotation is: (<= 1 f_~z~0) [2022-03-20 17:48:45,587 INFO L878 garLoopResultBuilder]: At program point L30-3(line 30) the Hoare annotation is: (<= 1 f_~z~0) [2022-03-20 17:48:45,588 INFO L885 garLoopResultBuilder]: At program point L39(lines 39 40) the Hoare annotation is: true [2022-03-20 17:48:45,588 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (<= 1 f_~z~0) [2022-03-20 17:48:45,588 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-03-20 17:48:45,588 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-03-20 17:48:45,588 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-03-20 17:48:45,588 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-03-20 17:48:45,588 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 48 56) the Hoare annotation is: true [2022-03-20 17:48:45,589 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 48 56) the Hoare annotation is: true [2022-03-20 17:48:45,589 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 48 56) the Hoare annotation is: true [2022-03-20 17:48:45,589 INFO L885 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: true [2022-03-20 17:48:45,589 INFO L885 garLoopResultBuilder]: At program point L53-1(lines 50 54) the Hoare annotation is: true [2022-03-20 17:48:45,589 INFO L885 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: true [2022-03-20 17:48:45,589 INFO L885 garLoopResultBuilder]: At program point L50(lines 50 54) the Hoare annotation is: true [2022-03-20 17:48:45,590 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 17:48:45,590 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 17:48:45,590 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 17:48:45,590 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 17:48:45,590 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 17:48:45,591 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 17:48:45,591 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 17:48:45,591 INFO L878 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-03-20 17:48:45,591 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-20 17:48:45,591 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-03-20 17:48:45,591 INFO L878 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-20 17:48:45,592 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-20 17:48:45,592 INFO L878 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-03-20 17:48:45,597 INFO L719 BasicCegarLoop]: Path program histogram: [2] [2022-03-20 17:48:45,598 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 17:48:45,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:48:45 BoogieIcfgContainer [2022-03-20 17:48:45,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 17:48:45,614 INFO L158 Benchmark]: Toolchain (without parser) took 1280.71ms. Allocated memory was 190.8MB in the beginning and 285.2MB in the end (delta: 94.4MB). Free memory was 136.3MB in the beginning and 207.4MB in the end (delta: -71.0MB). Peak memory consumption was 23.4MB. Max. memory is 8.0GB. [2022-03-20 17:48:45,615 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 190.8MB. Free memory is still 152.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 17:48:45,616 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.68ms. Allocated memory was 190.8MB in the beginning and 285.2MB in the end (delta: 94.4MB). Free memory was 136.1MB in the beginning and 257.7MB in the end (delta: -121.6MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. [2022-03-20 17:48:45,616 INFO L158 Benchmark]: Boogie Preprocessor took 52.72ms. Allocated memory is still 285.2MB. Free memory was 257.7MB in the beginning and 256.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 17:48:45,617 INFO L158 Benchmark]: RCFGBuilder took 250.69ms. Allocated memory is still 285.2MB. Free memory was 255.9MB in the beginning and 244.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 17:48:45,617 INFO L158 Benchmark]: TraceAbstraction took 737.78ms. Allocated memory is still 285.2MB. Free memory was 244.4MB in the beginning and 207.4MB in the end (delta: 37.0MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. [2022-03-20 17:48:45,619 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 190.8MB. Free memory is still 152.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 234.68ms. Allocated memory was 190.8MB in the beginning and 285.2MB in the end (delta: 94.4MB). Free memory was 136.1MB in the beginning and 257.7MB in the end (delta: -121.6MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.72ms. Allocated memory is still 285.2MB. Free memory was 257.7MB in the beginning and 256.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 250.69ms. Allocated memory is still 285.2MB. Free memory was 255.9MB in the beginning and 244.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 737.78ms. Allocated memory is still 285.2MB. Free memory was 244.4MB in the beginning and 207.4MB in the end (delta: 37.0MB). Peak memory consumption was 36.7MB. 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: 19]: 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 7 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 87 IncrementalHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 30 mSDtfsCounter, 87 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 6, 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: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 50 PreInvPairs, 85 NumberOfFragments, 75 HoareAnnotationTreeSize, 50 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 32 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.1s 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: 30]: Loop Invariant Derived loop invariant: 1 <= z - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 25]: Procedure Contract for f Derived contract for procedure f: 1 - ProcedureContractResult [Line: 48]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! [2022-03-20 17:48:45,656 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...