/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-crafted-1/loopv1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:25:45,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:25:45,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:25:45,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:25:45,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:25:45,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:25:45,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:25:45,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:25:45,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:25:45,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:25:45,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:25:45,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:25:45,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:25:45,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:25:45,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:25:45,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:25:45,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:25:45,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:25:45,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:25:45,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:25:45,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:25:45,811 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:25:45,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:25:45,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:25:45,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:25:45,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:25:45,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:25:45,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:25:45,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:25:45,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:25:45,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:25:45,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:25:45,814 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:25:45,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:25:45,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:25:46,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:25:46,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:25:46,006 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:25:46,008 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:25:46,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c [2022-01-31 23:25:46,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c8556a8/0f4b8e473535483ab3c128b854936dd8/FLAGb0d3503a4 [2022-01-31 23:25:46,403 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:25:46,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv1.c [2022-01-31 23:25:46,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c8556a8/0f4b8e473535483ab3c128b854936dd8/FLAGb0d3503a4 [2022-01-31 23:25:46,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c8556a8/0f4b8e473535483ab3c128b854936dd8 [2022-01-31 23:25:46,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:25:46,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:25:46,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:25:46,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:25:46,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:25:46,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c94c595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46, skipping insertion in model container [2022-01-31 23:25:46,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:25:46,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:25:46,597 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-crafted-1/loopv1.c[456,469] [2022-01-31 23:25:46,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:25:46,622 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:25:46,652 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-crafted-1/loopv1.c[456,469] [2022-01-31 23:25:46,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:25:46,663 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:25:46,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46 WrapperNode [2022-01-31 23:25:46,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:25:46,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:25:46,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:25:46,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:25:46,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:25:46,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:25:46,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:25:46,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:25:46,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (1/1) ... [2022-01-31 23:25:46,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:25:46,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:25:46,717 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) [2022-01-31 23:25:46,737 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 [2022-01-31 23:25:46,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:25:46,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:25:46,748 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:25:46,748 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 23:25:46,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:25:46,748 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:25:46,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:25:46,748 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:25:46,748 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:25:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:25:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:25:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 23:25:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:25:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:25:46,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:25:46,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:25:46,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:25:46,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:25:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:25:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:25:46,798 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:25:46,800 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:25:46,871 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:25:46,874 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:25:46,874 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 23:25:46,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:25:46 BoogieIcfgContainer [2022-01-31 23:25:46,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:25:46,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:25:46,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:25:46,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:25:46,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:25:46" (1/3) ... [2022-01-31 23:25:46,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecf290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:25:46, skipping insertion in model container [2022-01-31 23:25:46,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:46" (2/3) ... [2022-01-31 23:25:46,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecf290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:25:46, skipping insertion in model container [2022-01-31 23:25:46,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:25:46" (3/3) ... [2022-01-31 23:25:46,880 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv1.c [2022-01-31 23:25:46,883 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:25:46,884 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:25:46,909 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:25:46,914 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=QVASR [2022-01-31 23:25:46,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:25:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 23:25:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 23:25:46,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:46,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:46,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:46,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1965397839, now seen corresponding path program 1 times [2022-01-31 23:25:46,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:46,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388992675] [2022-01-31 23:25:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:46,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:46,976 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:47,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:25:47,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:47,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388992675] [2022-01-31 23:25:47,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388992675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:47,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:47,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:25:47,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305415126] [2022-01-31 23:25:47,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:47,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:25:47,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:25:47,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:25:47,214 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2022-01-31 23:25:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:47,390 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 23:25:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:25:47,392 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 [2022-01-31 23:25:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:47,397 INFO L225 Difference]: With dead ends: 43 [2022-01-31 23:25:47,397 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 23:25:47,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:25:47,412 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:47,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 37 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:25:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 23:25:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-01-31 23:25:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 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) [2022-01-31 23:25:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-31 23:25:47,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-01-31 23:25:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:47,438 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-31 23:25:47,438 INFO L471 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) [2022-01-31 23:25:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-31 23:25:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 23:25:47,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:47,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:47,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:25:47,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2050700910, now seen corresponding path program 1 times [2022-01-31 23:25:47,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511451081] [2022-01-31 23:25:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:47,457 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:493) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:426) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkEquivalence(SmtUtils.java:2374) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.areFormulasEquivalent(SmtUtils.java:2366) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrUtils.checkTermEquiv(QvasrUtils.java:211) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.simplifyRealMultiplication(QvasrAbstractor.java:720) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.gaussPartialPivot(QvasrAbstractor.java:196) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.gaussianSolve(QvasrAbstractor.java:132) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.computeAbstraction(QvasrAbstractor.java:111) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:133) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:79) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:210) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:185) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-31 23:25:47,460 INFO L158 Benchmark]: Toolchain (without parser) took 1037.52ms. Allocated memory was 212.9MB in the beginning and 370.1MB in the end (delta: 157.3MB). Free memory was 161.1MB in the beginning and 300.9MB in the end (delta: -139.8MB). Peak memory consumption was 18.1MB. Max. memory is 8.0GB. [2022-01-31 23:25:47,461 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 212.9MB. Free memory is still 177.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:25:47,461 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.75ms. Allocated memory was 212.9MB in the beginning and 370.1MB in the end (delta: 157.3MB). Free memory was 161.0MB in the beginning and 345.0MB in the end (delta: -184.0MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-01-31 23:25:47,462 INFO L158 Benchmark]: Boogie Preprocessor took 21.01ms. Allocated memory is still 370.1MB. Free memory was 345.0MB in the beginning and 343.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 23:25:47,462 INFO L158 Benchmark]: RCFGBuilder took 189.93ms. Allocated memory is still 370.1MB. Free memory was 343.4MB in the beginning and 332.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 23:25:47,462 INFO L158 Benchmark]: TraceAbstraction took 583.04ms. Allocated memory is still 370.1MB. Free memory was 331.9MB in the beginning and 300.9MB in the end (delta: 30.9MB). Peak memory consumption was 30.4MB. Max. memory is 8.0GB. [2022-01-31 23:25:47,464 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 212.9MB. Free memory is still 177.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 239.75ms. Allocated memory was 212.9MB in the beginning and 370.1MB in the end (delta: 157.3MB). Free memory was 161.0MB in the beginning and 345.0MB in the end (delta: -184.0MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.01ms. Allocated memory is still 370.1MB. Free memory was 345.0MB in the beginning and 343.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 189.93ms. Allocated memory is still 370.1MB. Free memory was 343.4MB in the beginning and 332.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 583.04ms. Allocated memory is still 370.1MB. Free memory was 331.9MB in the beginning and 300.9MB in the end (delta: 30.9MB). Peak memory consumption was 30.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:493) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-31 23:25:47,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...