/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:18:41,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:18:41,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:18:41,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:18:41,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:18:42,019 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:18:42,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:18:42,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:18:42,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:18:42,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:18:42,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:18:42,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:18:42,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:18:42,024 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:18:42,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:18:42,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:18:42,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:18:42,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:18:42,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:18:42,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:18:42,025 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:18:42,025 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:18:42,026 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:18:42,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:18:42,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:18:42,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:18:42,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:18:42,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:18:42,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:18:42,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:18:42,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:18:42,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:18:42,027 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:18:42,027 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:18:42,027 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:18:42,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:18:42,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:18:42,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:18:42,028 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:18:42,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:18:42,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:18:42,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:18:42,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:18:42,261 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:18:42,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c [2022-01-10 03:18:42,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2ea7347e/58ba148153534264b9f38eb156ed9c6e/FLAGf7a624e91 [2022-01-10 03:18:42,659 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:18:42,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c [2022-01-10 03:18:42,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2ea7347e/58ba148153534264b9f38eb156ed9c6e/FLAGf7a624e91 [2022-01-10 03:18:43,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2ea7347e/58ba148153534264b9f38eb156ed9c6e [2022-01-10 03:18:43,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:18:43,087 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:18:43,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:18:43,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:18:43,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:18:43,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf7df53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43, skipping insertion in model container [2022-01-10 03:18:43,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:18:43,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:18:43,233 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c[537,550] [2022-01-10 03:18:43,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:18:43,259 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:18:43,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c[537,550] [2022-01-10 03:18:43,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:18:43,289 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:18:43,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43 WrapperNode [2022-01-10 03:18:43,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:18:43,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:18:43,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:18:43,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:18:43,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,343 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-01-10 03:18:43,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:18:43,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:18:43,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:18:43,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:18:43,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:18:43,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:18:43,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:18:43,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:18:43,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (1/1) ... [2022-01-10 03:18:43,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:18:43,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:18:43,394 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) [2022-01-10 03:18:43,396 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 [2022-01-10 03:18:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:18:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:18:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:18:43,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:18:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:18:43,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:18:43,477 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:18:43,478 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:18:43,581 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:18:43,590 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:18:43,590 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 03:18:43,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:18:43 BoogieIcfgContainer [2022-01-10 03:18:43,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:18:43,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:18:43,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:18:43,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:18:43,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:18:43" (1/3) ... [2022-01-10 03:18:43,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7f59fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:18:43, skipping insertion in model container [2022-01-10 03:18:43,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:18:43" (2/3) ... [2022-01-10 03:18:43,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7f59fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:18:43, skipping insertion in model container [2022-01-10 03:18:43,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:18:43" (3/3) ... [2022-01-10 03:18:43,601 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound1.c [2022-01-10 03:18:43,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:18:43,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:18:43,639 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:18:43,643 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=FAST_UPR [2022-01-10 03:18:43,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:18:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:18:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 03:18:43,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:18:43,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:18:43,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:18:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:18:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2022-01-10 03:18:43,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:18:43,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570959635] [2022-01-10 03:18:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:18:43,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:18:43,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:18:43,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:18:43,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:18:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:18:43,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:18:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:18:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:18:43,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:18:43,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:18:43,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570959635] [2022-01-10 03:18:43,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570959635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:18:43,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:18:43,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:18:43,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358238787] [2022-01-10 03:18:43,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:18:43,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:18:43,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:18:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:18:43,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:18:43,803 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:18:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:18:43,819 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2022-01-10 03:18:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:18:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 03:18:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:18:43,826 INFO L225 Difference]: With dead ends: 53 [2022-01-10 03:18:43,826 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 03:18:43,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:18:43,843 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:18:43,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:18:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 03:18:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 03:18:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:18:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-01-10 03:18:43,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2022-01-10 03:18:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:18:43,908 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-01-10 03:18:43,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:18:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-01-10 03:18:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 03:18:43,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:18:43,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:18:43,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 03:18:44,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:18:44,110 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:18:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:18:44,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2022-01-10 03:18:44,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:18:44,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681372310] [2022-01-10 03:18:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:18:44,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:18:44,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:18:44,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:18:44,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:18:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:18:44,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:18:44,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:18:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:18:44,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:18:44,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:18:44,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681372310] [2022-01-10 03:18:44,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681372310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:18:44,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:18:44,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:18:44,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041639245] [2022-01-10 03:18:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:18:44,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:18:44,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:18:44,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:18:44,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:18:44,247 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:18:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:18:44,350 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-01-10 03:18:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:18:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 03:18:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:18:44,354 INFO L225 Difference]: With dead ends: 38 [2022-01-10 03:18:44,354 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 03:18:44,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:18:44,355 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:18:44,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 113 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:18:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 03:18:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-01-10 03:18:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:18:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-01-10 03:18:44,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-01-10 03:18:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:18:44,369 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-01-10 03:18:44,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:18:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-01-10 03:18:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 03:18:44,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:18:44,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:18:44,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 03:18:44,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:18:44,586 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:18:44,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:18:44,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2022-01-10 03:18:44,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:18:44,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203195095] [2022-01-10 03:18:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:18:44,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:18:44,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:18:44,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:18:44,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:18:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:18:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:18:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:18:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:18:44,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:18:44,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:18:44,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203195095] [2022-01-10 03:18:44,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203195095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:18:44,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:18:44,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:18:44,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943552043] [2022-01-10 03:18:44,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:18:44,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:18:44,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:18:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:18:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:18:44,669 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:18:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:18:44,685 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-01-10 03:18:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:18:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 03:18:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:18:44,686 INFO L225 Difference]: With dead ends: 44 [2022-01-10 03:18:44,686 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 03:18:44,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:18:44,688 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:18:44,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:18:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 03:18:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 03:18:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:18:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-01-10 03:18:44,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-01-10 03:18:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:18:44,695 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-01-10 03:18:44,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:18:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-01-10 03:18:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:18:44,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:18:44,696 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:18:44,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:18:44,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:18:44,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:18:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:18:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2022-01-10 03:18:44,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:18:44,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424552388] [2022-01-10 03:18:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:18:44,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:18:44,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:18:44,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:18:44,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:18:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:18:44,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:18:44,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:18:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:18:44,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:18:44,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:18:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424552388] [2022-01-10 03:18:44,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424552388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:18:44,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:18:44,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:18:44,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542538904] [2022-01-10 03:18:44,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:18:44,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:18:44,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:18:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:18:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:18:45,001 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:18:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:18:45,108 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-01-10 03:18:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:18:45,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-10 03:18:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:18:45,110 INFO L225 Difference]: With dead ends: 44 [2022-01-10 03:18:45,110 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 03:18:45,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:18:45,111 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:18:45,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 109 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:18:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 03:18:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2022-01-10 03:18:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:18:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-01-10 03:18:45,118 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2022-01-10 03:18:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:18:45,119 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-01-10 03:18:45,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:18:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-01-10 03:18:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 03:18:45,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:18:45,121 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:18:45,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:18:45,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:18:45,328 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:18:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:18:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2022-01-10 03:18:45,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:18:45,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853087014] [2022-01-10 03:18:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:18:45,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:18:45,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:18:45,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:18:45,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:18:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:18:45,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:18:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:18:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:18:45,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:18:45,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:18:45,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853087014] [2022-01-10 03:18:45,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853087014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:18:45,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:18:45,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:18:45,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246747797] [2022-01-10 03:18:45,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:18:45,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:18:45,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:18:45,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:18:45,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:18:45,460 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:18:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:18:45,580 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2022-01-10 03:18:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:18:45,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-10 03:18:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:18:45,583 INFO L225 Difference]: With dead ends: 63 [2022-01-10 03:18:45,583 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 03:18:45,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:18:45,584 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:18:45,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:18:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 03:18:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-10 03:18:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 03:18:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-01-10 03:18:45,597 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2022-01-10 03:18:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:18:45,597 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-01-10 03:18:45,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:18:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-01-10 03:18:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:18:45,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:18:45,598 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:18:45,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:18:45,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:18:45,808 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:18:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:18:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2022-01-10 03:18:45,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:18:45,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244165424] [2022-01-10 03:18:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:18:45,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:18:45,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:18:45,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:18:45,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:18:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:18:45,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:18:45,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:18:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:18:45,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:18:45,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:18:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244165424] [2022-01-10 03:18:45,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244165424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:18:45,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:18:45,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:18:45,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274877264] [2022-01-10 03:18:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:18:45,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:18:45,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:18:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:18:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:18:45,986 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:18:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:18:46,112 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-01-10 03:18:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:18:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-10 03:18:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:18:46,114 INFO L225 Difference]: With dead ends: 62 [2022-01-10 03:18:46,114 INFO L226 Difference]: Without dead ends: 54 [2022-01-10 03:18:46,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:18:46,115 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:18:46,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 94 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:18:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-10 03:18:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-01-10 03:18:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 36 states have internal predecessors, (43), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-10 03:18:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-01-10 03:18:46,123 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2022-01-10 03:18:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:18:46,123 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-01-10 03:18:46,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:18:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-01-10 03:18:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 03:18:46,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:18:46,125 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:18:46,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 03:18:46,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:18:46,334 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:18:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:18:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1091220578, now seen corresponding path program 1 times [2022-01-10 03:18:46,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:18:46,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480995695] [2022-01-10 03:18:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:18:46,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:18:46,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:18:46,338 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:18:46,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:18:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 03:18:46,379 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 03:18:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 03:18:46,435 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-01-10 03:18:46,436 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 03:18:46,437 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 03:18:46,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:18:46,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:18:46,641 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:18:46,644 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 03:18:46,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:18:46 BoogieIcfgContainer [2022-01-10 03:18:46,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 03:18:46,671 INFO L158 Benchmark]: Toolchain (without parser) took 3583.56ms. Allocated memory was 202.4MB in the beginning and 292.6MB in the end (delta: 90.2MB). Free memory was 145.7MB in the beginning and 159.2MB in the end (delta: -13.6MB). Peak memory consumption was 76.2MB. Max. memory is 8.0GB. [2022-01-10 03:18:46,671 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 202.4MB. Free memory was 161.7MB in the beginning and 161.6MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 03:18:46,672 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.33ms. Allocated memory was 202.4MB in the beginning and 292.6MB in the end (delta: 90.2MB). Free memory was 145.5MB in the beginning and 267.3MB in the end (delta: -121.7MB). Peak memory consumption was 16.9MB. Max. memory is 8.0GB. [2022-01-10 03:18:46,672 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.89ms. Allocated memory is still 292.6MB. Free memory was 267.3MB in the beginning and 265.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 03:18:46,672 INFO L158 Benchmark]: Boogie Preprocessor took 18.04ms. Allocated memory is still 292.6MB. Free memory was 265.2MB in the beginning and 264.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 03:18:46,673 INFO L158 Benchmark]: RCFGBuilder took 229.42ms. Allocated memory is still 292.6MB. Free memory was 264.1MB in the beginning and 252.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-10 03:18:46,673 INFO L158 Benchmark]: TraceAbstraction took 3077.04ms. Allocated memory is still 292.6MB. Free memory was 252.0MB in the beginning and 159.2MB in the end (delta: 92.8MB). Peak memory consumption was 93.3MB. Max. memory is 8.0GB. [2022-01-10 03:18:46,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 202.4MB. Free memory was 161.7MB in the beginning and 161.6MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.33ms. Allocated memory was 202.4MB in the beginning and 292.6MB in the end (delta: 90.2MB). Free memory was 145.5MB in the beginning and 267.3MB in the end (delta: -121.7MB). Peak memory consumption was 16.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.89ms. Allocated memory is still 292.6MB. Free memory was 267.3MB in the beginning and 265.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.04ms. Allocated memory is still 292.6MB. Free memory was 265.2MB in the beginning and 264.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 229.42ms. Allocated memory is still 292.6MB. Free memory was 264.1MB in the beginning and 252.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3077.04ms. Allocated memory is still 292.6MB. Free memory was 252.0MB in the beginning and 159.2MB in the end (delta: 92.8MB). Peak memory consumption was 93.3MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [A=-2147483648, B=2, counter=0, d=2, p=1, q=0, r=-2147483648] [L35] EXPR counter++ VAL [A=-2147483648, B=2, counter=1, counter++=0, d=2, p=1, q=0, r=-2147483648] [L35] COND TRUE counter++<1 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [A=-2147483648, B=2, counter=1, d=2, p=1, q=0, r=-2147483648] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [A=-2147483648, B=2, counter=1, d=2, p=1, q=0, r=-2147483648] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=-2147483648, B=2, counter=1, d=2, p=1, q=0, r=-2147483648] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=-2147483648, B=2, counter=1, d=4, p=2, q=0, r=-2147483648] [L35] EXPR counter++ VAL [A=-2147483648, B=2, counter=2, counter++=1, d=4, p=2, q=0, r=-2147483648] [L35] COND FALSE !(counter++<1) [L45] EXPR counter++ VAL [A=-2147483648, B=2, counter=3, counter++=2, d=4, p=2, q=0, r=-2147483648] [L45] COND FALSE !(counter++<1) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L59] RET __VERIFIER_assert(A == d*q + r) VAL [A=-2147483648, B=2, counter=3, d=4, p=2, q=0, r=-2147483648] [L60] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 67 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 565 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 366 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 140 IncrementalHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 199 mSDtfsCounter, 140 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=6, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 17 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 213 SizeOfPredicates, 4 NumberOfNonLiveVariables, 234 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 28/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-01-10 03:18:46,701 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...