/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-simple/nested_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:29:50,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:29:50,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:29:50,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:29:50,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:29:50,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:29:50,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:29:50,208 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 22:29:50,237 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:29:50,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:29:50,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:29:50,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:29:50,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:29:50,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:29:50,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:29:50,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:29:50,239 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:29:50,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:29:50,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:29:50,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:29:50,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:29:50,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:29:50,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:29:50,241 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:29:50,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:29:50,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:29:50,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:29:50,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:29:50,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:29:50,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:29:50,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:29:50,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:29:50,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:29:50,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:29:50,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:29:50,242 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:29:50,242 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:29:50,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:29:50,243 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:29:50,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:29:50,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:29:50,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:29:50,443 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:29:50,444 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:29:50,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_5.c [2022-01-09 22:29:50,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f58ef788e/7183f0682b294011a3f907e772c4701f/FLAG5be71a24e [2022-01-09 22:29:50,767 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:29:50,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c [2022-01-09 22:29:50,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f58ef788e/7183f0682b294011a3f907e772c4701f/FLAG5be71a24e [2022-01-09 22:29:51,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f58ef788e/7183f0682b294011a3f907e772c4701f [2022-01-09 22:29:51,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:29:51,226 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:29:51,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:29:51,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:29:51,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:29:51,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198e90b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51, skipping insertion in model container [2022-01-09 22:29:51,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:29:51,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:29:51,353 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-simple/nested_5.c[899,912] [2022-01-09 22:29:51,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:29:51,363 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:29:51,379 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-simple/nested_5.c[899,912] [2022-01-09 22:29:51,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:29:51,388 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:29:51,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51 WrapperNode [2022-01-09 22:29:51,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:29:51,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:29:51,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:29:51,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:29:51,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,414 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2022-01-09 22:29:51,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:29:51,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:29:51,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:29:51,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:29:51,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:29:51,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:29:51,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:29:51,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:29:51,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (1/1) ... [2022-01-09 22:29:51,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:29:51,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:29:51,465 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 22:29:51,467 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 22:29:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:29:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:29:51,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:29:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:29:51,532 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:29:51,533 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:29:51,600 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:29:51,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:29:51,604 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-09 22:29:51,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:29:51 BoogieIcfgContainer [2022-01-09 22:29:51,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:29:51,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:29:51,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:29:51,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:29:51,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:29:51" (1/3) ... [2022-01-09 22:29:51,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3461dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:29:51, skipping insertion in model container [2022-01-09 22:29:51,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:29:51" (2/3) ... [2022-01-09 22:29:51,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3461dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:29:51, skipping insertion in model container [2022-01-09 22:29:51,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:29:51" (3/3) ... [2022-01-09 22:29:51,611 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_5.c [2022-01-09 22:29:51,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:29:51,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:29:51,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:29:51,671 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 22:29:51,671 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:29:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 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 22:29:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-09 22:29:51,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:51,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-09 22:29:51,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 28698534, now seen corresponding path program 1 times [2022-01-09 22:29:51,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:51,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553411356] [2022-01-09 22:29:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:51,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:51,825 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 22:29:51,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:51,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553411356] [2022-01-09 22:29:51,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553411356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:29:51,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:29:51,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:29:51,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895653101] [2022-01-09 22:29:51,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:29:51,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:29:51,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:29:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:51,861 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 22:29:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:51,906 INFO L93 Difference]: Finished difference Result 46 states and 76 transitions. [2022-01-09 22:29:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:29:51,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-01-09 22:29:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:51,915 INFO L225 Difference]: With dead ends: 46 [2022-01-09 22:29:51,915 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 22:29:51,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:51,920 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:51,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 22:29:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2022-01-09 22:29:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 22:29:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-01-09 22:29:51,953 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 5 [2022-01-09 22:29:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:51,953 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-01-09 22:29:51,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 22:29:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-01-09 22:29:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 22:29:51,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:51,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:29:51,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:29:51,956 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash 270418006, now seen corresponding path program 1 times [2022-01-09 22:29:51,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:51,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889607074] [2022-01-09 22:29:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:51,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:52,009 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 22:29:52,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:52,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889607074] [2022-01-09 22:29:52,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889607074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:29:52,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:29:52,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:29:52,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890400255] [2022-01-09 22:29:52,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:29:52,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:29:52,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:29:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:52,014 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 22:29:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:52,032 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-09 22:29:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:29:52,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 22:29:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:52,034 INFO L225 Difference]: With dead ends: 37 [2022-01-09 22:29:52,035 INFO L226 Difference]: Without dead ends: 24 [2022-01-09 22:29:52,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:52,039 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:52,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-09 22:29:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-01-09 22:29:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 22:29:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-09 22:29:52,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2022-01-09 22:29:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:52,048 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-09 22:29:52,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 22:29:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-09 22:29:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 22:29:52,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:52,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:29:52,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:29:52,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1592253138, now seen corresponding path program 1 times [2022-01-09 22:29:52,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:52,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718169840] [2022-01-09 22:29:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:52,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:29:52,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:52,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718169840] [2022-01-09 22:29:52,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718169840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:29:52,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:29:52,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:29:52,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574921113] [2022-01-09 22:29:52,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:29:52,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:29:52,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:29:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:52,106 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 22:29:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:52,121 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-01-09 22:29:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:29:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 22:29:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:52,123 INFO L225 Difference]: With dead ends: 37 [2022-01-09 22:29:52,123 INFO L226 Difference]: Without dead ends: 23 [2022-01-09 22:29:52,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:52,126 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:52,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-09 22:29:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-01-09 22:29:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 22:29:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-09 22:29:52,129 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-01-09 22:29:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:52,129 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-09 22:29:52,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 22:29:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-09 22:29:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-09 22:29:52,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:52,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:29:52,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 22:29:52,130 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1010250086, now seen corresponding path program 1 times [2022-01-09 22:29:52,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:52,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937730293] [2022-01-09 22:29:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:52,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:29:52,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:52,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937730293] [2022-01-09 22:29:52,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937730293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:29:52,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:29:52,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:29:52,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201481565] [2022-01-09 22:29:52,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:29:52,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:29:52,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:29:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:52,176 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 22:29:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:52,192 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-01-09 22:29:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:29:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) Word has length 14 [2022-01-09 22:29:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:52,194 INFO L225 Difference]: With dead ends: 37 [2022-01-09 22:29:52,194 INFO L226 Difference]: Without dead ends: 22 [2022-01-09 22:29:52,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:52,202 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:52,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-09 22:29:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-01-09 22:29:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 22:29:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-09 22:29:52,209 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2022-01-09 22:29:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:52,209 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-09 22:29:52,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 22:29:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-09 22:29:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 22:29:52,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:52,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:29:52,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 22:29:52,210 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 884246574, now seen corresponding path program 1 times [2022-01-09 22:29:52,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:52,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244133866] [2022-01-09 22:29:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:52,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:29:52,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244133866] [2022-01-09 22:29:52,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244133866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:29:52,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:29:52,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:29:52,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725248021] [2022-01-09 22:29:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:29:52,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:29:52,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:52,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:29:52,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:52,244 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 22:29:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:52,266 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-09 22:29:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:29:52,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2022-01-09 22:29:52,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:52,267 INFO L225 Difference]: With dead ends: 37 [2022-01-09 22:29:52,267 INFO L226 Difference]: Without dead ends: 21 [2022-01-09 22:29:52,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:29:52,269 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:52,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-09 22:29:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-01-09 22:29:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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 22:29:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-01-09 22:29:52,275 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 17 [2022-01-09 22:29:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:52,275 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-01-09 22:29:52,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 22:29:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-01-09 22:29:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-09 22:29:52,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:52,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:29:52,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 22:29:52,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 291300972, now seen corresponding path program 1 times [2022-01-09 22:29:52,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:52,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724389525] [2022-01-09 22:29:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:52,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:29:52,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724389525] [2022-01-09 22:29:52,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724389525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:29:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574579185] [2022-01-09 22:29:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:52,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:29:52,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:29:52,305 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 22:29:52,306 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 22:29:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 22:29:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:29:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:29:52,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:29:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:29:52,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574579185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:29:52,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:29:52,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-09 22:29:52,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773473450] [2022-01-09 22:29:52,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:29:52,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-09 22:29:52,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-09 22:29:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:29:52,470 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 22:29:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:52,496 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-01-09 22:29:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:29:52,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 22:29:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:52,498 INFO L225 Difference]: With dead ends: 43 [2022-01-09 22:29:52,498 INFO L226 Difference]: Without dead ends: 26 [2022-01-09 22:29:52,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:29:52,500 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:52,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-09 22:29:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-09 22:29:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 22:29:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-09 22:29:52,508 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2022-01-09 22:29:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:52,508 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-09 22:29:52,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 22:29:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-09 22:29:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-09 22:29:52,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:52,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:29:52,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-09 22:29:52,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-09 22:29:52,725 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:52,726 INFO L85 PathProgramCache]: Analyzing trace with hash -163187674, now seen corresponding path program 2 times [2022-01-09 22:29:52,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:52,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294072616] [2022-01-09 22:29:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:52,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 22:29:52,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294072616] [2022-01-09 22:29:52,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294072616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:29:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618865175] [2022-01-09 22:29:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:29:52,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:29:52,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:29:52,781 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 22:29:52,782 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 22:29:52,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:29:52,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:29:52,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 22:29:52,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:29:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:29:52,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:29:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:29:52,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618865175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:29:52,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:29:52,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-01-09 22:29:52,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017620162] [2022-01-09 22:29:52,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:29:52,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 22:29:52,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 22:29:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:29:52,992 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 22:29:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:53,137 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-01-09 22:29:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 22:29:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 25 [2022-01-09 22:29:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:53,138 INFO L225 Difference]: With dead ends: 82 [2022-01-09 22:29:53,138 INFO L226 Difference]: Without dead ends: 59 [2022-01-09 22:29:53,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-01-09 22:29:53,138 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:53,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 51 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-09 22:29:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2022-01-09 22:29:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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 22:29:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-01-09 22:29:53,143 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 25 [2022-01-09 22:29:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:53,143 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-01-09 22:29:53,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 22:29:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-01-09 22:29:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 22:29:53,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:53,144 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:29:53,167 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 22:29:53,367 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,SelfDestructingSolverStorable6 [2022-01-09 22:29:53,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1386680934, now seen corresponding path program 3 times [2022-01-09 22:29:53,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:53,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062803568] [2022-01-09 22:29:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:53,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-01-09 22:29:53,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062803568] [2022-01-09 22:29:53,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062803568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:29:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753376898] [2022-01-09 22:29:53,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:29:53,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:29:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:29:53,419 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 22:29:53,419 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 22:29:53,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-09 22:29:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:29:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 22:29:53,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:29:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-09 22:29:53,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:29:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-09 22:29:53,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753376898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:29:53,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:29:53,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-09 22:29:53,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426968900] [2022-01-09 22:29:53,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:29:53,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:29:53,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:29:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:29:53,636 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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 22:29:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:53,731 INFO L93 Difference]: Finished difference Result 464 states and 520 transitions. [2022-01-09 22:29:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 22:29:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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 44 [2022-01-09 22:29:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:53,735 INFO L225 Difference]: With dead ends: 464 [2022-01-09 22:29:53,736 INFO L226 Difference]: Without dead ends: 422 [2022-01-09 22:29:53,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-01-09 22:29:53,737 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 218 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:53,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 69 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-09 22:29:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 294. [2022-01-09 22:29:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.1126279863481228) internal successors, (326), 293 states have internal predecessors, (326), 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 22:29:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 326 transitions. [2022-01-09 22:29:53,781 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 326 transitions. Word has length 44 [2022-01-09 22:29:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:53,781 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 326 transitions. [2022-01-09 22:29:53,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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 22:29:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 326 transitions. [2022-01-09 22:29:53,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-09 22:29:53,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:53,786 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-09 22:29:53,803 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 22:29:53,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:29:54,000 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1978019754, now seen corresponding path program 4 times [2022-01-09 22:29:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:54,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148082530] [2022-01-09 22:29:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:54,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 4294 proven. 1 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2022-01-09 22:29:54,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:54,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148082530] [2022-01-09 22:29:54,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148082530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:29:54,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762127749] [2022-01-09 22:29:54,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:29:54,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:29:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:29:54,129 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 22:29:54,136 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 22:29:54,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:29:54,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:29:54,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:29:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:29:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-01-09 22:29:54,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:29:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-01-09 22:29:54,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762127749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:29:54,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:29:54,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-01-09 22:29:54,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617045695] [2022-01-09 22:29:54,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:29:54,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 22:29:54,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 22:29:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:29:54,910 INFO L87 Difference]: Start difference. First operand 294 states and 326 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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 22:29:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:55,126 INFO L93 Difference]: Finished difference Result 2572 states and 2888 transitions. [2022-01-09 22:29:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 22:29:55,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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 293 [2022-01-09 22:29:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:55,132 INFO L225 Difference]: With dead ends: 2572 [2022-01-09 22:29:55,133 INFO L226 Difference]: Without dead ends: 2282 [2022-01-09 22:29:55,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-01-09 22:29:55,134 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 168 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:55,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 80 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2022-01-09 22:29:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1530. [2022-01-09 22:29:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 1.081752779594506) internal successors, (1654), 1529 states have internal predecessors, (1654), 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 22:29:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 1654 transitions. [2022-01-09 22:29:55,227 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 1654 transitions. Word has length 293 [2022-01-09 22:29:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:55,227 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 1654 transitions. [2022-01-09 22:29:55,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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 22:29:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 1654 transitions. [2022-01-09 22:29:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1530 [2022-01-09 22:29:55,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:29:55,262 INFO L514 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-09 22:29:55,283 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 22:29:55,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:29:55,478 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:29:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:29:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash 630309798, now seen corresponding path program 5 times [2022-01-09 22:29:55,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:29:55,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209079167] [2022-01-09 22:29:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:29:55,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:29:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:29:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 88166 proven. 3149 refuted. 0 times theorem prover too weak. 311023 trivial. 0 not checked. [2022-01-09 22:29:56,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:29:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209079167] [2022-01-09 22:29:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209079167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:29:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313841527] [2022-01-09 22:29:56,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:29:56,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:29:56,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:29:56,058 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 22:29:56,059 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 22:29:56,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-01-09 22:29:56,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:29:56,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:29:56,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:29:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-01-09 22:29:57,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:29:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-01-09 22:29:59,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313841527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:29:59,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:29:59,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-09 22:29:59,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688752352] [2022-01-09 22:29:59,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:29:59,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 22:29:59,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:29:59,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 22:29:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-09 22:29:59,599 INFO L87 Difference]: Start difference. First operand 1530 states and 1654 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 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 22:29:59,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:29:59,790 INFO L93 Difference]: Finished difference Result 5845 states and 6334 transitions. [2022-01-09 22:29:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:29:59,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 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 1529 [2022-01-09 22:29:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:29:59,804 INFO L225 Difference]: With dead ends: 5845 [2022-01-09 22:29:59,804 INFO L226 Difference]: Without dead ends: 4506 [2022-01-09 22:29:59,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3061 GetRequests, 3054 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-09 22:29:59,807 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:29:59,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 61 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:29:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2022-01-09 22:29:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 4506. [2022-01-09 22:29:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 1.0774694783573806) internal successors, (4854), 4505 states have internal predecessors, (4854), 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 22:29:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 4854 transitions. [2022-01-09 22:29:59,981 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 4854 transitions. Word has length 1529 [2022-01-09 22:29:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:29:59,982 INFO L470 AbstractCegarLoop]: Abstraction has 4506 states and 4854 transitions. [2022-01-09 22:29:59,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 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 22:29:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 4854 transitions. [2022-01-09 22:30:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4506 [2022-01-09 22:30:00,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:30:00,118 INFO L514 BasicCegarLoop]: trace histogram [1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-09 22:30:00,136 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 22:30:00,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 22:30:00,327 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:30:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:30:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash -837672026, now seen corresponding path program 6 times [2022-01-09 22:30:00,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:30:00,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722627007] [2022-01-09 22:30:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:30:00,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:30:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:30:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359703 proven. 113309 refuted. 0 times theorem prover too weak. 2150622 trivial. 0 not checked. [2022-01-09 22:30:03,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:30:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722627007] [2022-01-09 22:30:03,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722627007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:30:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749208756] [2022-01-09 22:30:03,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 22:30:03,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:30:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:30:03,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:30:03,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 22:30:08,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 753 check-sat command(s) [2022-01-09 22:30:08,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:30:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 5357 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:30:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:30:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-01-09 22:30:13,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:30:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-01-09 22:30:17,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749208756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:30:17,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:30:17,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-09 22:30:17,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972540922] [2022-01-09 22:30:17,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:30:17,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 22:30:17,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:30:17,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 22:30:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-09 22:30:17,644 INFO L87 Difference]: Start difference. First operand 4506 states and 4854 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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 22:30:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:30:18,126 INFO L93 Difference]: Finished difference Result 16862 states and 18175 transitions. [2022-01-09 22:30:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:30:18,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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 4505 [2022-01-09 22:30:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:30:18,162 INFO L225 Difference]: With dead ends: 16862 [2022-01-09 22:30:18,162 INFO L226 Difference]: Without dead ends: 13482 [2022-01-09 22:30:18,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9013 GetRequests, 9006 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-09 22:30:18,172 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:30:18,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 74 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:30:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13482 states. [2022-01-09 22:30:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13482 to 13482. [2022-01-09 22:30:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13482 states, 13481 states have (on average 1.0769230769230769) internal successors, (14518), 13481 states have internal predecessors, (14518), 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 22:30:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13482 states to 13482 states and 14518 transitions. [2022-01-09 22:30:18,699 INFO L78 Accepts]: Start accepts. Automaton has 13482 states and 14518 transitions. Word has length 4505 [2022-01-09 22:30:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:30:18,700 INFO L470 AbstractCegarLoop]: Abstraction has 13482 states and 14518 transitions. [2022-01-09 22:30:18,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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 22:30:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 13482 states and 14518 transitions. [2022-01-09 22:30:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13482 [2022-01-09 22:30:19,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:30:19,595 INFO L514 BasicCegarLoop]: trace histogram [5184, 5184, 864, 864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-09 22:30:19,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 22:30:19,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:30:19,796 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:30:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:30:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash 704779174, now seen corresponding path program 7 times [2022-01-09 22:30:19,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:30:19,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467135979] [2022-01-09 22:30:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:30:19,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:30:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat