/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_Default.epf -i ../../../trunk/examples/svcomp/loop-new/nested-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:24:27,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:24:27,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:24:27,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:24:27,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:24:27,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:24:27,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:24:27,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:24:27,478 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:24:27,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:24:27,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:24:27,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:24:27,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:24:27,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:24:27,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:24:27,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:24:27,481 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:24:27,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:24:27,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:24:27,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:24:27,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:24:27,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:24:27,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:24:27,481 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:24:27,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:24:27,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:24:27,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:24:27,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:24:27,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:24:27,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:24:27,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:24:27,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:24:27,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:24:27,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:24:27,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:24:27,485 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:24:27,485 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:24:27,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:24:27,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:24:27,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:24:27,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:24:27,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:24:27,709 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:24:27,718 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:24:27,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/nested-1.i [2022-01-09 22:24:27,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00e29e72/1a2b573a72564baaa6dd7d6ad52a5e26/FLAG8094abdcb [2022-01-09 22:24:28,234 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:24:28,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i [2022-01-09 22:24:28,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00e29e72/1a2b573a72564baaa6dd7d6ad52a5e26/FLAG8094abdcb [2022-01-09 22:24:28,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00e29e72/1a2b573a72564baaa6dd7d6ad52a5e26 [2022-01-09 22:24:28,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:24:28,256 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:24:28,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:24:28,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:24:28,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:24:28,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f5676f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28, skipping insertion in model container [2022-01-09 22:24:28,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:24:28,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:24:28,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i[891,904] [2022-01-09 22:24:28,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:24:28,442 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:24:28,453 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i[891,904] [2022-01-09 22:24:28,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:24:28,470 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:24:28,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28 WrapperNode [2022-01-09 22:24:28,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:24:28,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:24:28,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:24:28,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:24:28,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,493 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-01-09 22:24:28,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:24:28,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:24:28,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:24:28,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:24:28,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:24:28,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:24:28,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:24:28,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:24:28,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (1/1) ... [2022-01-09 22:24:28,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:24:28,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:24:28,539 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) [2022-01-09 22:24:28,557 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 [2022-01-09 22:24:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:24:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:24:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:24:28,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:24:28,611 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:24:28,612 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:24:28,714 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:24:28,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:24:28,718 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 22:24:28,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:24:28 BoogieIcfgContainer [2022-01-09 22:24:28,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:24:28,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:24:28,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:24:28,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:24:28,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:24:28" (1/3) ... [2022-01-09 22:24:28,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b523cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:24:28, skipping insertion in model container [2022-01-09 22:24:28,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:24:28" (2/3) ... [2022-01-09 22:24:28,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b523cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:24:28, skipping insertion in model container [2022-01-09 22:24:28,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:24:28" (3/3) ... [2022-01-09 22:24:28,727 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-1.i [2022-01-09 22:24:28,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:24:28,730 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:24:28,773 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:24:28,779 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 [2022-01-09 22:24:28,779 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:24:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 22:24:28,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:28,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:28,803 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:28,807 INFO L85 PathProgramCache]: Analyzing trace with hash 179613278, now seen corresponding path program 1 times [2022-01-09 22:24:28,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:28,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248596028] [2022-01-09 22:24:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:28,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:28,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:28,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248596028] [2022-01-09 22:24:28,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248596028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:24:28,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:24:28,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 22:24:28,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432987915] [2022-01-09 22:24:28,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:24:28,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:24:28,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:24:29,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:24:29,027 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:29,055 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-01-09 22:24:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:24:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-09 22:24:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:29,061 INFO L225 Difference]: With dead ends: 35 [2022-01-09 22:24:29,061 INFO L226 Difference]: Without dead ends: 16 [2022-01-09 22:24:29,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:24:29,065 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:29,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:24:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-09 22:24:29,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2022-01-09 22:24:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-01-09 22:24:29,085 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-01-09 22:24:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:29,085 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-01-09 22:24:29,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-01-09 22:24:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 22:24:29,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:29,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:29,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:24:29,086 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash 754200042, now seen corresponding path program 1 times [2022-01-09 22:24:29,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:29,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492656231] [2022-01-09 22:24:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:29,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:29,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:29,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492656231] [2022-01-09 22:24:29,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492656231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:24:29,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:24:29,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 22:24:29,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961312459] [2022-01-09 22:24:29,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:24:29,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:24:29,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:24:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:24:29,117 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:29,128 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-01-09 22:24:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:24:29,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-09 22:24:29,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:29,128 INFO L225 Difference]: With dead ends: 23 [2022-01-09 22:24:29,129 INFO L226 Difference]: Without dead ends: 15 [2022-01-09 22:24:29,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:24:29,130 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:29,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:24:29,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-09 22:24:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-01-09 22:24:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-01-09 22:24:29,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-01-09 22:24:29,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-01-09 22:24:29,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-01-09 22:24:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 22:24:29,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:29,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:29,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:24:29,135 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:29,135 INFO L85 PathProgramCache]: Analyzing trace with hash -902976276, now seen corresponding path program 1 times [2022-01-09 22:24:29,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:29,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303451227] [2022-01-09 22:24:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:29,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:29,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303451227] [2022-01-09 22:24:29,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303451227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:24:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857872328] [2022-01-09 22:24:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:29,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:24:29,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:24:29,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:24:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:24:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:24:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:29,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:24:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:29,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857872328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:24:29,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:24:29,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-09 22:24:29,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002690064] [2022-01-09 22:24:29,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:24:29,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 22:24:29,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 22:24:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:24:29,353 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:29,404 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-09 22:24:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:24:29,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-09 22:24:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:29,406 INFO L225 Difference]: With dead ends: 29 [2022-01-09 22:24:29,406 INFO L226 Difference]: Without dead ends: 20 [2022-01-09 22:24:29,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:24:29,408 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:29,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:24:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-09 22:24:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-09 22:24:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-01-09 22:24:29,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-01-09 22:24:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:29,412 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-01-09 22:24:29,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-01-09 22:24:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-09 22:24:29,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:29,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:29,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:24:29,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:29,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:29,630 INFO L85 PathProgramCache]: Analyzing trace with hash 86791922, now seen corresponding path program 2 times [2022-01-09 22:24:29,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:29,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217950336] [2022-01-09 22:24:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:29,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:29,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:29,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217950336] [2022-01-09 22:24:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217950336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:24:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557313608] [2022-01-09 22:24:29,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:24:29,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:29,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:24:29,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:24:29,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:24:29,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:24:29,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:24:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:24:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:24:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:29,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:24:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:29,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557313608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:24:29,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:24:29,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-09 22:24:29,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952602421] [2022-01-09 22:24:29,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:24:29,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 22:24:29,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 22:24:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2022-01-09 22:24:29,914 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:29,995 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-01-09 22:24:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 22:24:29,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-09 22:24:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:29,996 INFO L225 Difference]: With dead ends: 47 [2022-01-09 22:24:29,996 INFO L226 Difference]: Without dead ends: 32 [2022-01-09 22:24:29,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2022-01-09 22:24:29,997 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:29,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 26 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:24:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-09 22:24:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-09 22:24:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-01-09 22:24:30,002 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2022-01-09 22:24:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:30,003 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-01-09 22:24:30,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-01-09 22:24:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-09 22:24:30,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:30,004 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:30,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:24:30,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-09 22:24:30,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash -238373506, now seen corresponding path program 3 times [2022-01-09 22:24:30,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:30,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56683093] [2022-01-09 22:24:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:30,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-09 22:24:30,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:30,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56683093] [2022-01-09 22:24:30,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56683093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:24:30,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222679877] [2022-01-09 22:24:30,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:24:30,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:30,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:24:30,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:24:30,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:24:30,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-09 22:24:30,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:24:30,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:24:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:24:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-09 22:24:30,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:24:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-09 22:24:30,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222679877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:24:30,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:24:30,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-09 22:24:30,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303533200] [2022-01-09 22:24:30,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:24:30,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 22:24:30,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:30,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 22:24:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:24:30,583 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:30,623 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2022-01-09 22:24:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:24:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-09 22:24:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:30,625 INFO L225 Difference]: With dead ends: 105 [2022-01-09 22:24:30,625 INFO L226 Difference]: Without dead ends: 101 [2022-01-09 22:24:30,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:24:30,626 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:30,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 31 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:24:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-09 22:24:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-09 22:24:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.05) internal successors, (105), 100 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-01-09 22:24:30,652 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 31 [2022-01-09 22:24:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:30,652 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-01-09 22:24:30,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-01-09 22:24:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-09 22:24:30,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:30,654 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:30,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 22:24:30,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:30,871 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -112220578, now seen corresponding path program 4 times [2022-01-09 22:24:30,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:30,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778548434] [2022-01-09 22:24:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:30,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-01-09 22:24:31,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:31,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778548434] [2022-01-09 22:24:31,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778548434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:24:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084554689] [2022-01-09 22:24:31,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:24:31,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:31,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:24:31,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:24:31,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:24:31,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:24:31,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:24:31,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:24:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:24:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-01-09 22:24:31,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:24:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-01-09 22:24:31,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084554689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:24:31,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:24:31,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-09 22:24:31,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518359036] [2022-01-09 22:24:31,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:24:31,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 22:24:31,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 22:24:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2022-01-09 22:24:31,674 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:31,778 INFO L93 Difference]: Finished difference Result 243 states and 258 transitions. [2022-01-09 22:24:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 22:24:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-01-09 22:24:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:31,780 INFO L225 Difference]: With dead ends: 243 [2022-01-09 22:24:31,780 INFO L226 Difference]: Without dead ends: 239 [2022-01-09 22:24:31,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2022-01-09 22:24:31,781 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 150 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:31,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 52 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:24:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-09 22:24:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-01-09 22:24:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.046218487394958) internal successors, (249), 238 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 249 transitions. [2022-01-09 22:24:31,816 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 249 transitions. Word has length 100 [2022-01-09 22:24:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:31,816 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 249 transitions. [2022-01-09 22:24:31,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 249 transitions. [2022-01-09 22:24:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-09 22:24:31,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:31,819 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:31,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 22:24:32,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:32,036 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash -16999842, now seen corresponding path program 5 times [2022-01-09 22:24:32,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:32,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523761862] [2022-01-09 22:24:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:32,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 10917 proven. 119 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 22:24:35,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523761862] [2022-01-09 22:24:35,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523761862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:24:35,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138226232] [2022-01-09 22:24:35,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:24:35,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:35,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:24:35,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:24:35,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:24:35,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 81 check-sat command(s) [2022-01-09 22:24:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:24:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 104 conjunts are in the unsatisfiable core [2022-01-09 22:24:35,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:24:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 11036 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 22:24:36,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:24:36,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138226232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:24:36,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:24:36,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [104] total 106 [2022-01-09 22:24:36,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145701952] [2022-01-09 22:24:36,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:24:36,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-09 22:24:36,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:36,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-09 22:24:36,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2022-01-09 22:24:36,527 INFO L87 Difference]: Start difference. First operand 239 states and 249 transitions. Second operand has 104 states, 104 states have (on average 2.2884615384615383) internal successors, (238), 104 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:37,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:37,675 INFO L93 Difference]: Finished difference Result 9779 states and 10239 transitions. [2022-01-09 22:24:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-09 22:24:37,676 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.2884615384615383) internal successors, (238), 104 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2022-01-09 22:24:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:37,678 INFO L225 Difference]: With dead ends: 9779 [2022-01-09 22:24:37,678 INFO L226 Difference]: Without dead ends: 0 [2022-01-09 22:24:37,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5366, Invalid=5976, Unknown=0, NotChecked=0, Total=11342 [2022-01-09 22:24:37,690 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 260 mSDsluCounter, 2477 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 2856 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:37,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 2856 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 22:24:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-09 22:24:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-09 22:24:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-09 22:24:37,692 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 238 [2022-01-09 22:24:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:37,692 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-09 22:24:37,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.2884615384615383) internal successors, (238), 104 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-09 22:24:37,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-09 22:24:37,694 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-09 22:24:37,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:24:37,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:37,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.