/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/iftelse.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:01:22,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:01:22,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:01:22,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 04:01:22,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:01:22,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:01:22,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:01:22,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:01:22,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:01:22,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:01:22,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:01:22,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:01:22,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:01:22,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:01:22,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:01:22,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:01:22,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:01:22,866 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:01:22,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:01:22,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:01:22,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:01:22,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:01:22,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:01:22,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:01:22,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:01:22,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:01:22,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:01:22,868 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:01:22,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:01:23,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:01:23,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:01:23,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:01:23,106 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:01:23,106 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:01:23,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/iftelse.c [2022-02-15 04:01:23,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2239a16fb/afadf9769aa74e399e06906980ec613b/FLAG7ffcaa399 [2022-02-15 04:01:23,478 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:01:23,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/iftelse.c [2022-02-15 04:01:23,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2239a16fb/afadf9769aa74e399e06906980ec613b/FLAG7ffcaa399 [2022-02-15 04:01:23,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2239a16fb/afadf9769aa74e399e06906980ec613b [2022-02-15 04:01:23,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:01:23,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:01:23,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:01:23,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:01:23,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:01:23,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:01:23" (1/1) ... [2022-02-15 04:01:23,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e13e533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:23, skipping insertion in model container [2022-02-15 04:01:23,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:01:23" (1/1) ... [2022-02-15 04:01:23,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:01:23,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:01:24,045 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/iftelse.c[406,419] [2022-02-15 04:01:24,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:01:24,068 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:01:24,077 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/iftelse.c[406,419] [2022-02-15 04:01:24,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:01:24,097 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:01:24,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24 WrapperNode [2022-02-15 04:01:24,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:01:24,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:01:24,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:01:24,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:01:24,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (1/1) ... [2022-02-15 04:01:24,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (1/1) ... [2022-02-15 04:01:24,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (1/1) ... [2022-02-15 04:01:24,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (1/1) ... [2022-02-15 04:01:24,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (1/1) ... [2022-02-15 04:01:24,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (1/1) ... [2022-02-15 04:01:24,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (1/1) ... [2022-02-15 04:01:24,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:01:24,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:01:24,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:01:24,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:01:24,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (1/1) ... [2022-02-15 04:01:24,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:01:24,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:01:24,171 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) [2022-02-15 04:01:24,188 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 [2022-02-15 04:01:24,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:01:24,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:01:24,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:01:24,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 04:01:24,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 04:01:24,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:01:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:01:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:01:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:01:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:01:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 04:01:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 04:01:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 04:01:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:01:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:01:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:01:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:01:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:01:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:01:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:01:24,256 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:01:24,259 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:01:24,374 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:01:24,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:01:24,378 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:01:24,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:01:24 BoogieIcfgContainer [2022-02-15 04:01:24,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:01:24,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:01:24,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:01:24,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:01:24,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:01:23" (1/3) ... [2022-02-15 04:01:24,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a864c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:01:24, skipping insertion in model container [2022-02-15 04:01:24,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:01:24" (2/3) ... [2022-02-15 04:01:24,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a864c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:01:24, skipping insertion in model container [2022-02-15 04:01:24,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:01:24" (3/3) ... [2022-02-15 04:01:24,385 INFO L111 eAbstractionObserver]: Analyzing ICFG iftelse.c [2022-02-15 04:01:24,389 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:01:24,389 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:01:24,452 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:01:24,457 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 [2022-02-15 04:01:24,457 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:01:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 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) [2022-02-15 04:01:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 04:01:24,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:01:24,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:01:24,487 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:01:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:01:24,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1034116429, now seen corresponding path program 1 times [2022-02-15 04:01:24,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:01:24,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953391398] [2022-02-15 04:01:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:01:24,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:01:24,551 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:01:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:01:24,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:01:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:01:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:01:25,023 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:01:25,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953391398] [2022-02-15 04:01:25,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953391398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:01:25,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:01:25,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:01:25,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714946590] [2022-02-15 04:01:25,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:01:25,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:01:25,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:01:25,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:01:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:01:25,063 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 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 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-02-15 04:01:27,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:01:29,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-15 04:01:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:01:29,568 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-02-15 04:01:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:01:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2022-02-15 04:01:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:01:29,574 INFO L225 Difference]: With dead ends: 53 [2022-02-15 04:01:29,575 INFO L226 Difference]: Without dead ends: 27 [2022-02-15 04:01:29,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:01:29,578 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:01:29,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 55 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-02-15 04:01:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-15 04:01:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-02-15 04:01:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 04:01:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-02-15 04:01:29,643 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-02-15 04:01:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:01:29,643 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-02-15 04:01:29,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-02-15 04:01:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-02-15 04:01:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 04:01:29,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:01:29,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:01:29,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:01:29,644 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:01:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:01:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash -244126219, now seen corresponding path program 1 times [2022-02-15 04:01:29,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:01:29,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159290578] [2022-02-15 04:01:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:01:29,993 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 04:01:29,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:01:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:01:30,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:01:30,083 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No Interpolants at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.getInterpolants(InterpolatingTraceCheckCraig.java:273) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:179) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:126) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:290) 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:216) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) 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) [2022-02-15 04:01:30,086 INFO L158 Benchmark]: Toolchain (without parser) took 6179.89ms. Allocated memory was 226.5MB in the beginning and 272.6MB in the end (delta: 46.1MB). Free memory was 173.3MB in the beginning and 169.6MB in the end (delta: 3.7MB). Peak memory consumption was 49.7MB. Max. memory is 8.0GB. [2022-02-15 04:01:30,086 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 226.5MB. Free memory is still 189.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 04:01:30,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.12ms. Allocated memory was 226.5MB in the beginning and 272.6MB in the end (delta: 46.1MB). Free memory was 173.1MB in the beginning and 246.7MB in the end (delta: -73.6MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-02-15 04:01:30,087 INFO L158 Benchmark]: Boogie Preprocessor took 30.66ms. Allocated memory is still 272.6MB. Free memory was 246.7MB in the beginning and 245.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 04:01:30,087 INFO L158 Benchmark]: RCFGBuilder took 249.09ms. Allocated memory is still 272.6MB. Free memory was 245.1MB in the beginning and 234.1MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 04:01:30,088 INFO L158 Benchmark]: TraceAbstraction took 5704.30ms. Allocated memory is still 272.6MB. Free memory was 233.6MB in the beginning and 169.6MB in the end (delta: 64.0MB). Peak memory consumption was 64.0MB. Max. memory is 8.0GB. [2022-02-15 04:01:30,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 226.5MB. Free memory is still 189.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 186.12ms. Allocated memory was 226.5MB in the beginning and 272.6MB in the end (delta: 46.1MB). Free memory was 173.1MB in the beginning and 246.7MB in the end (delta: -73.6MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.66ms. Allocated memory is still 272.6MB. Free memory was 246.7MB in the beginning and 245.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 249.09ms. Allocated memory is still 272.6MB. Free memory was 245.1MB in the beginning and 234.1MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 5704.30ms. Allocated memory is still 272.6MB. Free memory was 233.6MB in the beginning and 169.6MB in the end (delta: 64.0MB). Peak memory consumption was 64.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No Interpolants de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No Interpolants: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.getInterpolants(InterpolatingTraceCheckCraig.java:273) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-02-15 04:01:30,112 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...